61316815628 has 12 divisors (see below), whose sum is σ = 107439068352. Its totient is φ = 30619938960.

The previous prime is 61316815613. The next prime is 61316815633. The reversal of 61316815628 is 82651861316.

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, 9613628 + ... + 9620003.

It is an arithmetic number, because the mean of its divisors is an integer number (8953255696).

Almost surely, 2^61316815628 is an apocalyptic number.

It is an amenable number.

61316815628 is a deficient number, since it is larger than the sum of its proper divisors (46122252724).

61316815628 is a wasteful number, since it uses less digits than its factorization.

61316815628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19234432 (or 19234430 counting only the distinct ones).

The product of its digits is 414720, while the sum is 47.

The spelling of 61316815628 in words is "sixty-one billion, three hundred sixteen million, eight hundred fifteen thousand, six hundred twenty-eight".