71910999290 has 32 divisors (see below), whose sum is σ = 139527375120. Its totient is φ = 26526864384.

The previous prime is 71910999229. The next prime is 71910999313. The reversal of 71910999290 is 9299901917.

It can be written as a sum of positive squares in 8 ways, for example, as 1299097849 + 70611901441 = 36043^2 + 265729^2 .

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119759 + ... + 397698.

Almost surely, 2^71910999290 is an apocalyptic number.

71910999290 is a deficient number, since it is larger than the sum of its proper divisors (67616375830).

71910999290 is a wasteful number, since it uses less digits than its factorization.

71910999290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518546.

The product of its (nonzero) digits is 826686, while the sum is 56.

The spelling of 71910999290 in words is "seventy-one billion, nine hundred ten million, nine hundred ninety-nine thousand, two hundred ninety".