51405522550415 has 16 divisors (see below), whose sum is σ = 67294755603360. Its totient is φ = 37385693829120.

The previous prime is 51405522550387. The next prime is 51405522550423.

It is a happy number.

51405522550415 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 51405522550415 - 2³⁶ = 51336803073679 is a prime.

It is a congruent 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, 14303231 + ... + 17532639.

It is an arithmetic number, because the mean of its divisors is an integer number (4205922225210).

Almost surely, 2^{51405522550415} is an apocalyptic number.

51405522550415 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51405522550415 is a deficient number, since it is larger than the sum of its proper divisors (15889233052945).

51405522550415 is a wasteful number, since it uses less digits than its factorization.

51405522550415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3518842.

The product of its (nonzero) digits is 1000000, while the sum is 44.

It can be divided in two parts, 5140552 and 2550415, that added together give a palindrome (7690967).

The spelling of 51405522550415 in words is "fifty-one trillion, four hundred five billion, five hundred twenty-two million, five hundred fifty thousand, four hundred fifteen".