77538771 has 12 divisors (see below), whose sum is σ = 112621600. Its totient is φ = 51405840.

The previous prime is 77538763. The next prime is 77538821. The reversal of 77538771 is 17783577.

It is not a de Polignac number, because 77538771 - 2³ = 77538763 is a prime.

It is a super-2 number, since 2×77538771² = 12024522016380882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77538731) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22171 + ... + 25428.

Almost surely, 2^77538771 is an apocalyptic number.

77538771 is a deficient number, since it is larger than the sum of its proper divisors (35082829).

77538771 is a wasteful number, since it uses less digits than its factorization.

77538771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47786 (or 47783 counting only the distinct ones).

The product of its digits is 288120, while the sum is 45.

The square root of 77538771 is about 8805.6102003212. The cubic root of 77538771 is about 426.4220343121.

The spelling of 77538771 in words is "seventy-seven million, five hundred thirty-eight thousand, seven hundred seventy-one".