51574949451 has 20 divisors (see below), whose sum is σ = 77118768232. Its totient is φ = 34349959008.

The previous prime is 51574949449. The next prime is 51574949453. The reversal of 51574949451 is 15494947515.

51574949451 is a `hidden beast` number, since 5 + 15 + 7 + 494 + 94 + 51 = 666.

It is an interprime number because it is at equal distance from previous prime (51574949449) and next prime (51574949453).

It is not a de Polignac number, because 51574949451 - 2¹ = 51574949449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51574949453) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 224521 + ... + 391866.

Almost surely, 2^51574949451 is an apocalyptic number.

51574949451 is a deficient number, since it is larger than the sum of its proper divisors (25543818781).

51574949451 is a wasteful number, since it uses less digits than its factorization.

51574949451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617432 (or 617423 counting only the distinct ones).

The product of its digits is 4536000, while the sum is 54.

The spelling of 51574949451 in words is "fifty-one billion, five hundred seventy-four million, nine hundred forty-nine thousand, four hundred fifty-one".