51452540040 has 64 divisors (see below), whose sum is σ = 168390135360. Its totient is φ = 12473342720.

The previous prime is 51452540039. The next prime is 51452540047. The reversal of 51452540040 is 4004525415.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (51452540047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19488279 + ... + 19490918.

It is an arithmetic number, because the mean of its divisors is an integer number (2631095865).

Almost surely, 2^51452540040 is an apocalyptic number.

It is an amenable number.

51452540040 is an abundant number, since it is smaller than the sum of its proper divisors (116937595320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51452540040 is a wasteful number, since it uses less digits than its factorization.

51452540040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38979222 (or 38979218 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 30.

The spelling of 51452540040 in words is "fifty-one billion, four hundred fifty-two million, five hundred forty thousand, forty".