80621536 has 12 divisors (see below), whose sum is σ = 158723712. Its totient is φ = 40310752.

The previous prime is 80621501. The next prime is 80621543. The reversal of 80621536 is 63512608.

It is a junction number, because it is equal to n+sod(n) for n = 80621498 and 80621507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1259680 + ... + 1259743.

It is an arithmetic number, because the mean of its divisors is an integer number (13226976).

Almost surely, 2^80621536 is an apocalyptic number.

It is an amenable number.

80621536 is a deficient number, since it is larger than the sum of its proper divisors (78102176).

80621536 is a wasteful number, since it uses less digits than its factorization.

80621536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2519433 (or 2519425 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 80621536 is about 8978.9496044916. The cubic root of 80621536 is about 431.9999428441. Note that the first 4 decimals are identical.

The spelling of 80621536 in words is "eighty million, six hundred twenty-one thousand, five hundred thirty-six".