12401523520 has 28 divisors (see below), whose sum is σ = 29531128644. Its totient is φ = 4960609280.

The previous prime is 12401523517. The next prime is 12401523521. The reversal of 12401523520 is 2532510421.

It can be written as a sum of positive squares in 2 ways, for example, as 2351862016 + 10049661504 = 48496^2 + 100248^2 .

It is a super-2 number, since 2×12401523520² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12401523521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19377061 + ... + 19377700.

Almost surely, 2^12401523520 is an apocalyptic number.

12401523520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12401523520 is an abundant number, since it is smaller than the sum of its proper divisors (17129605124).

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

12401523520 is an equidigital number, since it uses as much as digits as its factorization.

12401523520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38754778 (or 38754768 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The spelling of 12401523520 in words is "twelve billion, four hundred one million, five hundred twenty-three thousand, five hundred twenty".