71928157012 has 12 divisors (see below), whose sum is σ = 125876636116. Its totient is φ = 35963403840.

The previous prime is 71928156913. The next prime is 71928157039. The reversal of 71928157012 is 21075182917.

It can be written as a sum of positive squares in 2 ways, for example, as 29259470916 + 42668686096 = 171054^2 + 206564^2 .

It is a super-2 number, since 2×71928157012² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71928157012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129958 + ... + 400930.

Almost surely, 2^71928157012 is an apocalyptic number.

It is an amenable number.

71928157012 is a deficient number, since it is larger than the sum of its proper divisors (53948479104).

71928157012 is a wasteful number, since it uses less digits than its factorization.

71928157012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337338 (or 337336 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 43.

The spelling of 71928157012 in words is "seventy-one billion, nine hundred twenty-eight million, one hundred fifty-seven thousand, twelve".