51151611020 has 24 divisors (see below), whose sum is σ = 107489537568. Its totient is φ = 20447091200.

The previous prime is 51151611011. The next prime is 51151611059. The reversal of 51151611020 is 2011615115.

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, 816101 + ... + 876540.

It is an arithmetic number, because the mean of its divisors is an integer number (4478730732).

Almost surely, 2^51151611020 is an apocalyptic number.

It is an amenable number.

51151611020 is an abundant number, since it is smaller than the sum of its proper divisors (56337926548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51151611020 is a wasteful number, since it uses less digits than its factorization.

51151611020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1694161 (or 1694159 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 23.

The spelling of 51151611020 in words is "fifty-one billion, one hundred fifty-one million, six hundred eleven thousand, twenty".