87172070570 has 64 divisors (see below), whose sum is σ = 169564104864. Its totient is φ = 32075550720.

The previous prime is 87172070567. The next prime is 87172070591. The reversal of 87172070570 is 7507027178.

It can be written as a sum of positive squares in 16 ways, for example, as 3886150921 + 83285919649 = 62339^2 + 288593^2 .

It is a super-2 number, since 2×87172070570² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84386774 + ... + 84387806.

Almost surely, 2^87172070570 is an apocalyptic number.

87172070570 is a deficient number, since it is larger than the sum of its proper divisors (82392034294).

87172070570 is a wasteful number, since it uses less digits than its factorization.

87172070570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2667.

The product of its (nonzero) digits is 192080, while the sum is 44.

The spelling of 87172070570 in words is "eighty-seven billion, one hundred seventy-two million, seventy thousand, five hundred seventy".