51209353955 has 16 divisors (see below), whose sum is σ = 61876638720. Its totient is φ = 40684796928.

The previous prime is 51209353883. The next prime is 51209353967. The reversal of 51209353955 is 55935390215.

It is a cyclic number.

It is not a de Polignac number, because 51209353955 - 2²² = 51205159651 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 388811 + ... + 503579.

It is an arithmetic number, because the mean of its divisors is an integer number (3867289920).

Almost surely, 2^51209353955 is an apocalyptic number.

51209353955 is a deficient number, since it is larger than the sum of its proper divisors (10667284765).

51209353955 is a wasteful number, since it uses less digits than its factorization.

51209353955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115390.

The product of its (nonzero) digits is 911250, while the sum is 47.

The spelling of 51209353955 in words is "fifty-one billion, two hundred nine million, three hundred fifty-three thousand, nine hundred fifty-five".