51167657988 has 48 divisors (see below), whose sum is σ = 132675780160. Its totient is φ = 17053457472.

The previous prime is 51167657987. The next prime is 51167658023. The reversal of 51167657988 is 88975676115.

51167657988 is a `hidden beast` number, since 51 + 1 + 6 + 7 + 6 + 579 + 8 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (51167657987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 830256 + ... + 889752.

Almost surely, 2^51167657988 is an apocalyptic number.

It is an amenable number.

51167657988 is an abundant number, since it is smaller than the sum of its proper divisors (81508122172).

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

51167657988 is a wasteful number, since it uses less digits than its factorization.

51167657988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67473 (or 67465 counting only the distinct ones).

The product of its digits is 25401600, while the sum is 63.

The spelling of 51167657988 in words is "fifty-one billion, one hundred sixty-seven million, six hundred fifty-seven thousand, nine hundred eighty-eight".