51550161101505 has 72 divisors (see below), whose sum is σ = 99350554919616. Its totient is φ = 24522431606400.

The previous prime is 51550161101479. The next prime is 51550161101519. The reversal of 51550161101505 is 50510116105515.

51550161101505 is a `hidden beast` number, since 51 + 550 + 1 + 6 + 1 + 1 + 0 + 1 + 50 + 5 = 666.

It is not a de Polignac number, because 51550161101505 - 2⁶ = 51550161101441 is a prime.

It is a super-2 number, since 2×51550161101505² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51550161101505.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 17146701 + ... + 19927610.

It is an arithmetic number, because the mean of its divisors is an integer number (1379868818328).

Almost surely, 2^{51550161101505} is an apocalyptic number.

51550161101505 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51550161101505 is a deficient number, since it is larger than the sum of its proper divisors (47800393818111).

51550161101505 is a wasteful number, since it uses less digits than its factorization.

51550161101505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37074439 (or 37074383 counting only the distinct ones).

The product of its (nonzero) digits is 18750, while the sum is 36.

The spelling of 51550161101505 in words is "fifty-one trillion, five hundred fifty billion, one hundred sixty-one million, one hundred one thousand, five hundred five".