261234454032 has 240 divisors, whose sum is σ = 761024942080. Its totient is φ = 83564006400.

The previous prime is 261234454021. The next prime is 261234454069. The reversal of 261234454032 is 230454432162.

261234454032 is a `hidden beast` number, since 2 + 61 + 23 + 4 + 4 + 540 + 32 = 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 polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 430369473 + ... + 430370079.

Almost surely, 2^261234454032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 261234454032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (380512471040).

261234454032 is an abundant number, since it is smaller than the sum of its proper divisors (499790488048).

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

261234454032 is a wasteful number, since it uses less digits than its factorization.

261234454032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302 (or 1293 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 36.

Adding to 261234454032 its reverse (230454432162), we get a palindrome (491688886194).

The spelling of 261234454032 in words is "two hundred sixty-one billion, two hundred thirty-four million, four hundred fifty-four thousand, thirty-two".