77541957 has 12 divisors (see below), whose sum is σ = 112245120. Its totient is φ = 51583848.

The previous prime is 77541953. The next prime is 77541979. The reversal of 77541957 is 75914577.

It is not a de Polignac number, because 77541957 - 2² = 77541953 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77541953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4683 + ... + 13304.

It is an arithmetic number, because the mean of its divisors is an integer number (9353760).

Almost surely, 2^77541957 is an apocalyptic number.

It is an amenable number.

77541957 is a deficient number, since it is larger than the sum of its proper divisors (34703163).

77541957 is a wasteful number, since it uses less digits than its factorization.

77541957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18472 (or 18469 counting only the distinct ones).

The product of its digits is 308700, while the sum is 45.

The square root of 77541957 is about 8805.7911058576. The cubic root of 77541957 is about 426.4278746677.

The spelling of 77541957 in words is "seventy-seven million, five hundred forty-one thousand, nine hundred fifty-seven".