51155764558 has 8 divisors (see below), whose sum is σ = 77878925352. Its totient is φ = 25196122776.

The previous prime is 51155764511. The next prime is 51155764567. The reversal of 51155764558 is 85546755115.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190879585 + ... + 190879852.

It is an arithmetic number, because the mean of its divisors is an integer number (9734865669).

Almost surely, 2^51155764558 is an apocalyptic number.

51155764558 is a deficient number, since it is larger than the sum of its proper divisors (26723160794).

51155764558 is a wasteful number, since it uses less digits than its factorization.

51155764558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381759506.

The product of its digits is 4200000, while the sum is 52.

The spelling of 51155764558 in words is "fifty-one billion, one hundred fifty-five million, seven hundred sixty-four thousand, five hundred fifty-eight".