51612635215 has 16 divisors (see below), whose sum is σ = 65221567200. Its totient is φ = 39100948992.

The previous prime is 51612635209. The next prime is 51612635233. The reversal of 51612635215 is 51253621615.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 51612635215 - 2¹⁷ = 51612504143 is a prime.

It is a super-2 number, since 2×51612635215² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 125091 + ... + 344779.

It is an arithmetic number, because the mean of its divisors is an integer number (4076347950).

Almost surely, 2^51612635215 is an apocalyptic number.

51612635215 is a deficient number, since it is larger than the sum of its proper divisors (13608931985).

51612635215 is a wasteful number, since it uses less digits than its factorization.

51612635215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222186.

The product of its digits is 54000, while the sum is 37.

The spelling of 51612635215 in words is "fifty-one billion, six hundred twelve million, six hundred thirty-five thousand, two hundred fifteen".