51620155612 has 12 divisors (see below), whose sum is σ = 90397454056. Its totient is φ = 25792311600.

The previous prime is 51620155603. The next prime is 51620155637. The reversal of 51620155612 is 21655102615.

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, 4435014 + ... + 4446637.

Almost surely, 2^51620155612 is an apocalyptic number.

It is an amenable number.

51620155612 is a deficient number, since it is larger than the sum of its proper divisors (38777298444).

51620155612 is a wasteful number, since it uses less digits than its factorization.

51620155612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8883108 (or 8883106 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 34.

The spelling of 51620155612 in words is "fifty-one billion, six hundred twenty million, one hundred fifty-five thousand, six hundred twelve".