129361008440 has 32 divisors (see below), whose sum is σ = 295406488080. Its totient is φ = 50972097792.

The previous prime is 129361008419. The next prime is 129361008449. The reversal of 129361008440 is 44800163921.

It is a super-2 number, since 2×129361008440² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 129361008394 and 129361008403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129361008449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24131837 + ... + 24137196.

Almost surely, 2^129361008440 is an apocalyptic number.

129361008440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129361008440 is an abundant number, since it is smaller than the sum of its proper divisors (166045479640).

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

129361008440 is a wasteful number, since it uses less digits than its factorization.

129361008440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48269111 (or 48269107 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The spelling of 129361008440 in words is "one hundred twenty-nine billion, three hundred sixty-one million, eight thousand, four hundred forty".