51061015211555 has 16 divisors (see below), whose sum is σ = 61882860297600. Its totient is φ = 40442423049600.

The previous prime is 51061015211447. The next prime is 51061015211567. The reversal of 51061015211555 is 55511251016015.

It is not a de Polignac number, because 51061015211555 - 2¹⁶ = 51061015146019 is a prime.

It is a super-2 number, since 2×51061015211555² (a number of 28 digits) contains 22 as substring.

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, 8122541 + ... + 12965249.

It is an arithmetic number, because the mean of its divisors is an integer number (3867678768600).

Almost surely, 2^{51061015211555} is an apocalyptic number.

51061015211555 is a deficient number, since it is larger than the sum of its proper divisors (10821845086045).

51061015211555 is a wasteful number, since it uses less digits than its factorization.

51061015211555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4863694.

The product of its (nonzero) digits is 37500, while the sum is 38.

The spelling of 51061015211555 in words is "fifty-one trillion, sixty-one billion, fifteen million, two hundred eleven thousand, five hundred fifty-five".