51345623615 has 32 divisors (see below), whose sum is σ = 72411494400. Its totient is φ = 34457915520.

The previous prime is 51345623557. The next prime is 51345623669. The reversal of 51345623615 is 51632654315.

It is not a de Polignac number, because 51345623615 - 2¹⁶ = 51345558079 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2390996 + ... + 2412374.

It is an arithmetic number, because the mean of its divisors is an integer number (2262859200).

Almost surely, 2^51345623615 is an apocalyptic number.

51345623615 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51345623615 is a deficient number, since it is larger than the sum of its proper divisors (21065870785).

51345623615 is a wasteful number, since it uses less digits than its factorization.

51345623615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24767.

The product of its digits is 324000, while the sum is 41.

The spelling of 51345623615 in words is "fifty-one billion, three hundred forty-five million, six hundred twenty-three thousand, six hundred fifteen".