51612322321615 has 64 divisors (see below), whose sum is σ = 72328037253120. Its totient is φ = 34940077885440.

The previous prime is 51612322321493. The next prime is 51612322321657.

51612322321615 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 51612322321615 - 2²¹ = 51612320224463 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 55284594 + ... + 56210416.

It is an arithmetic number, because the mean of its divisors is an integer number (1130125582080).

Almost surely, 2^{51612322321615} is an apocalyptic number.

51612322321615 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51612322321615 is a deficient number, since it is larger than the sum of its proper divisors (20715714931505).

51612322321615 is a wasteful number, since it uses less digits than its factorization.

51612322321615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926512.

The product of its digits is 129600, while the sum is 40.

It can be divided in two parts, 5161232 and 2321615, that added together give a palindrome (7482847).

The spelling of 51612322321615 in words is "fifty-one trillion, six hundred twelve billion, three hundred twenty-two million, three hundred twenty-one thousand, six hundred fifteen".