80691610 has 32 divisors (see below), whose sum is σ = 147747600. Its totient is φ = 31726080.

The previous prime is 80691581. The next prime is 80691623. The reversal of 80691610 is 1619608.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 35034561 + 45657049 = 5919^2 + 6757^2 .

It is a super-2 number, since 2×80691610² = 13022271848784200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 197086 + ... + 197494.

Almost surely, 2^80691610 is an apocalyptic number.

80691610 is a deficient number, since it is larger than the sum of its proper divisors (67055990).

80691610 is a wasteful number, since it uses less digits than its factorization.

80691610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 80691610 is about 8982.8508837674. The cubic root of 80691610 is about 432.1250673836.

It can be divided in two parts, 806 and 91610, that added together give a square (92416 = 304²).

The spelling of 80691610 in words is "eighty million, six hundred ninety-one thousand, six hundred ten".