51460990515 has 48 divisors (see below), whose sum is σ = 102429550080. Its totient is φ = 23637579840.

The previous prime is 51460990463. The next prime is 51460990517. The reversal of 51460990515 is 51509906415.

It is a happy number.

51460990515 is a `hidden beast` number, since 5 + 1 + 46 + 0 + 9 + 90 + 515 = 666.

It is not a de Polignac number, because 51460990515 - 2¹⁹ = 51460466227 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (51460990517) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2726427 + ... + 2745236.

It is an arithmetic number, because the mean of its divisors is an integer number (2133948960).

Almost surely, 2^51460990515 is an apocalyptic number.

51460990515 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

51460990515 is a deficient number, since it is larger than the sum of its proper divisors (50968559565).

51460990515 is a wasteful number, since it uses less digits than its factorization.

51460990515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5471704 (or 5471701 counting only the distinct ones).

The product of its (nonzero) digits is 243000, while the sum is 45.

The spelling of 51460990515 in words is "fifty-one billion, four hundred sixty million, nine hundred ninety thousand, five hundred fifteen".