129925610626 has 36 divisors (see below), whose sum is σ = 240069819654. Its totient is φ = 52401034560.

The previous prime is 129925610621. The next prime is 129925610663. The reversal of 129925610626 is 626016529921.

It can be written as a sum of positive squares in only one way, i.e., 95533537225 + 34392073401 = 309085^2 + 185451^2 .

It is a super-2 number, since 2×129925610626² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a self number, because there is not a number n which added to its sum of digits gives 129925610626.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129925610621) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 14708031 + ... + 14716861.

Almost surely, 2^129925610626 is an apocalyptic number.

129925610626 is a deficient number, since it is larger than the sum of its proper divisors (110144209028).

129925610626 is an frugal number, since it uses more digits than its factorization.

129925610626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17695 (or 8857 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 49.

The spelling of 129925610626 in words is "one hundred twenty-nine billion, nine hundred twenty-five million, six hundred ten thousand, six hundred twenty-six".