51251244536 has 32 divisors (see below), whose sum is σ = 97595652000. Its totient is φ = 25228734336.

The previous prime is 51251244529. The next prime is 51251244619. The reversal of 51251244536 is 63544215215.

It is a self number, because there is not a number n which added to its sum of digits gives 51251244536.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50276 + ... + 324083.

It is an arithmetic number, because the mean of its divisors is an integer number (3049864125).

Almost surely, 2^51251244536 is an apocalyptic number.

It is an amenable number.

51251244536 is a deficient number, since it is larger than the sum of its proper divisors (46344407464).

51251244536 is a wasteful number, since it uses less digits than its factorization.

51251244536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374631 (or 374627 counting only the distinct ones).

The product of its digits is 144000, while the sum is 38.

The spelling of 51251244536 in words is "fifty-one billion, two hundred fifty-one million, two hundred forty-four thousand, five hundred thirty-six".