51652121520 has 80 divisors (see below), whose sum is σ = 160258037472. Its totient is φ = 13762160640.

The previous prime is 51652121519. The next prime is 51652121567. The reversal of 51652121520 is 2512125615.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×51652121520² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192324 + ... + 374556.

Almost surely, 2^51652121520 is an apocalyptic number.

It is an amenable number.

51652121520 is an abundant number, since it is smaller than the sum of its proper divisors (108605915952).

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

51652121520 is a wasteful number, since it uses less digits than its factorization.

51652121520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183430 (or 183424 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 30.

The spelling of 51652121520 in words is "fifty-one billion, six hundred fifty-two million, one hundred twenty-one thousand, five hundred twenty".