2126405560 has 64 divisors (see below), whose sum is σ = 5071857120. Its totient is φ = 799580160.

The previous prime is 2126405549. The next prime is 2126405563. The reversal of 2126405560 is 655046212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2126405563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 880755 + ... + 883165.

Almost surely, 2^2126405560 is an apocalyptic number.

2126405560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2126405560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2535928560).

2126405560 is an abundant number, since it is smaller than the sum of its proper divisors (2945451560).

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

2126405560 is a wasteful number, since it uses less digits than its factorization.

2126405560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3736 (or 3732 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 2126405560 is about 46112.9652050267. The cubic root of 2126405560 is about 1285.9241909378.

The spelling of 2126405560 in words is "two billion, one hundred twenty-six million, four hundred five thousand, five hundred sixty".