51742745541 has 8 divisors (see below), whose sum is σ = 76655919360. Its totient is φ = 34495163676.

The previous prime is 51742745489. The next prime is 51742745573. The reversal of 51742745541 is 14554724715.

51742745541 is a `hidden beast` number, since 5 + 1 + 74 + 27 + 4 + 554 + 1 = 666.

It is not a de Polignac number, because 51742745541 - 2²¹ = 51740648389 is a prime.

It is a super-2 number, since 2×51742745541² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51742745641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 958198965 + ... + 958199018.

It is an arithmetic number, because the mean of its divisors is an integer number (9581989920).

Almost surely, 2^51742745541 is an apocalyptic number.

It is an amenable number.

51742745541 is a deficient number, since it is larger than the sum of its proper divisors (24913173819).

51742745541 is a wasteful number, since it uses less digits than its factorization.

51742745541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1916397992 (or 1916397986 counting only the distinct ones).

The product of its digits is 784000, while the sum is 45.

The spelling of 51742745541 in words is "fifty-one billion, seven hundred forty-two million, seven hundred forty-five thousand, five hundred forty-one".