12691525350 has 96 divisors (see below), whose sum is σ = 37535454720. Its totient is φ = 2774787840.

The previous prime is 12691525339. The next prime is 12691525393. The reversal of 12691525350 is 5352519621.

It is a super-2 number, since 2×12691525350² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12691525299 and 12691525308.

It is a congruent number.

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, 238615 + ... + 286914.

It is an arithmetic number, because the mean of its divisors is an integer number (390994320).

Almost surely, 2^12691525350 is an apocalyptic number.

12691525350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12691525350 is an abundant number, since it is smaller than the sum of its proper divisors (24843929370).

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

12691525350 is a wasteful number, since it uses less digits than its factorization.

12691525350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525574 (or 525569 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 39.

The spelling of 12691525350 in words is "twelve billion, six hundred ninety-one million, five hundred twenty-five thousand, three hundred fifty".