51440487358 has 24 divisors (see below), whose sum is σ = 84922495416. Its totient is φ = 23352544800.

The previous prime is 51440487331. The next prime is 51440487359. The reversal of 51440487358 is 85378404415.

It is a super-2 number, since 2×51440487358² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51440487359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1226848 + ... + 1268083.

It is an arithmetic number, because the mean of its divisors is an integer number (3538437309).

Almost surely, 2^51440487358 is an apocalyptic number.

51440487358 is a deficient number, since it is larger than the sum of its proper divisors (33482008058).

51440487358 is a wasteful number, since it uses less digits than its factorization.

51440487358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2495020 (or 2495007 counting only the distinct ones).

The product of its (nonzero) digits is 2150400, while the sum is 49.

The spelling of 51440487358 in words is "fifty-one billion, four hundred forty million, four hundred eighty-seven thousand, three hundred fifty-eight".