61386685928 has 32 divisors (see below), whose sum is σ = 115437173760. Its totient is φ = 30603576000.

The previous prime is 61386685901. The next prime is 61386685939. The reversal of 61386685928 is 82958668316.

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, 3915401 + ... + 3931047.

It is an arithmetic number, because the mean of its divisors is an integer number (3607411680).

Almost surely, 2^61386685928 is an apocalyptic number.

It is an amenable number.

61386685928 is a deficient number, since it is larger than the sum of its proper divisors (54050487832).

61386685928 is a wasteful number, since it uses less digits than its factorization.

61386685928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17057 (or 17053 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 62.

The spelling of 61386685928 in words is "sixty-one billion, three hundred eighty-six million, six hundred eighty-five thousand, nine hundred twenty-eight".