47877748857 has 6 divisors (see below), whose sum is σ = 69156748362. Its totient is φ = 31918499232.

The previous prime is 47877748843. The next prime is 47877748859. The reversal of 47877748857 is 75884777874.

47877748857 is a `hidden beast` number, since 4 + 78 + 7 + 77 + 488 + 5 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 44786833641 + 3090915216 = 211629^2 + 55596^2 .

It is not a de Polignac number, because 47877748857 - 2²⁶ = 47810639993 is a prime.

It is a super-2 number, since 2×47877748857² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (47877748859) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2659874928 + ... + 2659874945.

It is an arithmetic number, because the mean of its divisors is an integer number (11526124727).

Almost surely, 2^47877748857 is an apocalyptic number.

It is an amenable number.

47877748857 is a deficient number, since it is larger than the sum of its proper divisors (21278999505).

47877748857 is a wasteful number, since it uses less digits than its factorization.

47877748857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5319749879 (or 5319749876 counting only the distinct ones).

The product of its digits is 688414720, while the sum is 72.

The spelling of 47877748857 in words is "forty-seven billion, eight hundred seventy-seven million, seven hundred forty-eight thousand, eight hundred fifty-seven".