51500344540 has 24 divisors (see below), whose sum is σ = 108387396432. Its totient is φ = 20555057280.

The previous prime is 51500344537. The next prime is 51500344541. The reversal of 51500344540 is 4544300515.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51500344541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2808166 + ... + 2826445.

It is an arithmetic number, because the mean of its divisors is an integer number (4516141518).

Almost surely, 2^51500344540 is an apocalyptic number.

It is an amenable number.

51500344540 is an abundant number, since it is smaller than the sum of its proper divisors (56887051892).

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

51500344540 is a wasteful number, since it uses less digits than its factorization.

51500344540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5635077 (or 5635075 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

The spelling of 51500344540 in words is "fifty-one billion, five hundred million, three hundred forty-four thousand, five hundred forty".