51144954291 has 24 divisors (see below), whose sum is σ = 78453885744. Its totient is φ = 31995694080.

The previous prime is 51144954271. The next prime is 51144954313. The reversal of 51144954291 is 19245944115.

51144954291 is a `hidden beast` number, since 5 + 1 + 14 + 4 + 9 + 542 + 91 = 666.

It is not a de Polignac number, because 51144954291 - 2⁷ = 51144954163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51144954221) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 444405 + ... + 547526.

It is an arithmetic number, because the mean of its divisors is an integer number (3268911906).

Almost surely, 2^51144954291 is an apocalyptic number.

51144954291 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

51144954291 is a deficient number, since it is larger than the sum of its proper divisors (27308931453).

51144954291 is a wasteful number, since it uses less digits than its factorization.

51144954291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992291 (or 992288 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The spelling of 51144954291 in words is "fifty-one billion, one hundred forty-four million, nine hundred fifty-four thousand, two hundred ninety-one".