51656210155 has 16 divisors (see below), whose sum is σ = 67643398368. Its totient is φ = 37556640000.

The previous prime is 51656210131. The next prime is 51656210167. The reversal of 51656210155 is 55101265615.

It is not a de Polignac number, because 51656210155 - 2¹⁹ = 51655685867 is a prime.

It is a Duffinian 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, 39295 + ... + 323815.

It is an arithmetic number, because the mean of its divisors is an integer number (4227712398).

Almost surely, 2^51656210155 is an apocalyptic number.

51656210155 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51656210155 is a deficient number, since it is larger than the sum of its proper divisors (15987188213).

51656210155 is a wasteful number, since it uses less digits than its factorization.

51656210155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287838.

The product of its (nonzero) digits is 45000, while the sum is 37.

The spelling of 51656210155 in words is "fifty-one billion, six hundred fifty-six million, two hundred ten thousand, one hundred fifty-five".