51651570155 has 4 divisors (see below), whose sum is σ = 61981884192. Its totient is φ = 41321256120.

The previous prime is 51651570073. The next prime is 51651570161. The reversal of 51651570155 is 55107515615.

51651570155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 51651570155 - 2¹² = 51651566059 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5165157011 + ... + 5165157020.

It is an arithmetic number, because the mean of its divisors is an integer number (15495471048).

Almost surely, 2^51651570155 is an apocalyptic number.

51651570155 is a deficient number, since it is larger than the sum of its proper divisors (10330314037).

51651570155 is a wasteful number, since it uses less digits than its factorization.

51651570155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10330314036.

The product of its (nonzero) digits is 131250, while the sum is 41.

The spelling of 51651570155 in words is "fifty-one billion, six hundred fifty-one million, five hundred seventy thousand, one hundred fifty-five".