51201810418 has 64 divisors (see below), whose sum is σ = 87636422016. Its totient is φ = 22415976000.

The previous prime is 51201810403. The next prime is 51201810431. The reversal of 51201810418 is 81401810215.

It is a self number, because there is not a number n which added to its sum of digits gives 51201810418.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9945321 + ... + 9950467.

It is an arithmetic number, because the mean of its divisors is an integer number (1369319094).

Almost surely, 2^51201810418 is an apocalyptic number.

51201810418 is a deficient number, since it is larger than the sum of its proper divisors (36434611598).

51201810418 is a wasteful number, since it uses less digits than its factorization.

51201810418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5320 (or 5298 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 31.

The spelling of 51201810418 in words is "fifty-one billion, two hundred one million, eight hundred ten thousand, four hundred eighteen".