2601263664 has 30 divisors (see below), whose sum is σ = 7279925796. Its totient is φ = 867087840.

The previous prime is 2601263633. The next prime is 2601263711. The reversal of 2601263664 is 4663621062.

2601263664 is a `hidden beast` number, since 2 + 6 + 0 + 12 + 636 + 6 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9032022 + ... + 9032309.

Almost surely, 2^2601263664 is an apocalyptic number.

2601263664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2601263664 is an abundant number, since it is smaller than the sum of its proper divisors (4678662132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2601263664 is a wasteful number, since it uses less digits than its factorization.

2601263664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18064345 (or 18064336 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 2601263664 is about 51002.5848756708. The cubic root of 2601263664 is about 1375.2916034320.

It can be divided in two parts, 26012 and 63664, that added together give a triangular number (89676 = T₄₂₃).

The spelling of 2601263664 in words is "two billion, six hundred one million, two hundred sixty-three thousand, six hundred sixty-four".