126312156520 has 96 divisors (see below), whose sum is σ = 312803152200. Its totient is φ = 45870612480.

The previous prime is 126312156517. The next prime is 126312156563. The reversal of 126312156520 is 25651213621.

It can be written as a sum of positive squares in 4 ways, for example, as 122498600004 + 3813556516 = 349998^2 + 61754^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3704992 + ... + 3738928.

Almost surely, 2^126312156520 is an apocalyptic number.

126312156520 is a gapful number since it is divisible by the number (10) 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 126312156520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156401576100).

126312156520 is an abundant number, since it is smaller than the sum of its proper divisors (186490995680).

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

126312156520 is a wasteful number, since it uses less digits than its factorization.

126312156520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34739 (or 34724 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 126312156520 in words is "one hundred twenty-six billion, three hundred twelve million, one hundred fifty-six thousand, five hundred twenty".