51115554505 has 8 divisors (see below), whose sum is σ = 63317332224. Its totient is φ = 39573332400.

The previous prime is 51115554473. The next prime is 51115554527. The reversal of 51115554505 is 50545551115.

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

It is not a de Polignac number, because 51115554505 - 2⁵ = 51115554473 is a prime.

It is a super-2 number, since 2×51115554505² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

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, 164888731 + ... + 164889040.

It is an arithmetic number, because the mean of its divisors is an integer number (7914666528).

Almost surely, 2^51115554505 is an apocalyptic number.

It is an amenable number.

51115554505 is a deficient number, since it is larger than the sum of its proper divisors (12201777719).

51115554505 is a wasteful number, since it uses less digits than its factorization.

51115554505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329777807.

The product of its (nonzero) digits is 62500, while the sum is 37.

The spelling of 51115554505 in words is "fifty-one billion, one hundred fifteen million, five hundred fifty-four thousand, five hundred five".