80709516 has 54 divisors (see below), whose sum is σ = 207114180. Its totient is φ = 26499312.

The previous prime is 80709451. The next prime is 80709547. The reversal of 80709516 is 61590708.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 580575 + ... + 580713.

Almost surely, 2^80709516 is an apocalyptic number.

It is an amenable number.

80709516 is an abundant number, since it is smaller than the sum of its proper divisors (126404664).

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

80709516 is a wasteful number, since it uses less digits than its factorization.

80709516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 80709516 is about 8983.8475053843. The cubic root of 80709516 is about 432.1570288196.

It can be divided in two parts, 80709 and 516, that added together give a square (81225 = 285²).

The spelling of 80709516 in words is "eighty million, seven hundred nine thousand, five hundred sixteen".