51055557658 has 16 divisors (see below), whose sum is σ = 87639450624. Its totient is φ = 21852043920.

The previous prime is 51055557643. The next prime is 51055557689. The reversal of 51055557658 is 85675555015.

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, 2398138 + ... + 2419333.

It is an arithmetic number, because the mean of its divisors is an integer number (5477465664).

Almost surely, 2^51055557658 is an apocalyptic number.

51055557658 is a deficient number, since it is larger than the sum of its proper divisors (36583892966).

51055557658 is a wasteful number, since it uses less digits than its factorization.

51055557658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4818237.

The product of its (nonzero) digits is 5250000, while the sum is 52.

The spelling of 51055557658 in words is "fifty-one billion, fifty-five million, five hundred fifty-seven thousand, six hundred fifty-eight".