51646036460 has 24 divisors (see below), whose sum is σ = 108553819920. Its totient is φ = 20639911104.

The previous prime is 51646036457. The next prime is 51646036471. The reversal of 51646036460 is 6463064615.

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, 1133570 + ... + 1178249.

It is an arithmetic number, because the mean of its divisors is an integer number (4523075830).

Almost surely, 2^51646036460 is an apocalyptic number.

It is an amenable number.

51646036460 is an abundant number, since it is smaller than the sum of its proper divisors (56907783460).

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

51646036460 is a wasteful number, since it uses less digits than its factorization.

51646036460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2312945 (or 2312943 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 51646036460 in words is "fifty-one billion, six hundred forty-six million, thirty-six thousand, four hundred sixty".