80634629440 has 56 divisors (see below), whose sum is σ = 193875477120. Its totient is φ = 31940694528.

The previous prime is 80634629437. The next prime is 80634629441. The reversal of 80634629440 is 4492643608.

It is a super-2 number, since 2×80634629440² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80634629441) 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, 1190260 + ... + 1256179.

Almost surely, 2^80634629440 is an apocalyptic number.

80634629440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80634629440 is an abundant number, since it is smaller than the sum of its proper divisors (113240847680).

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

80634629440 is a wasteful number, since it uses less digits than its factorization.

80634629440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2446559 (or 2446549 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 46.

The spelling of 80634629440 in words is "eighty billion, six hundred thirty-four million, six hundred twenty-nine thousand, four hundred forty".