72326557810 has 16 divisors (see below), whose sum is σ = 140202250776. Its totient is φ = 26705190528.

The previous prime is 72326557801. The next prime is 72326557843. The reversal of 72326557810 is 1875562327.

It can be written as a sum of positive squares in 4 ways, for example, as 60913695249 + 11412862561 = 246807^2 + 106831^2 .

It is a super-2 number, since 2×72326557810² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278178939 + ... + 278179198.

Almost surely, 2^72326557810 is an apocalyptic number.

72326557810 is a deficient number, since it is larger than the sum of its proper divisors (67875692966).

72326557810 is a wasteful number, since it uses less digits than its factorization.

72326557810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556358157.

The product of its (nonzero) digits is 705600, while the sum is 46.

The spelling of 72326557810 in words is "seventy-two billion, three hundred twenty-six million, five hundred fifty-seven thousand, eight hundred ten".