77461157 has 16 divisors (see below), whose sum is σ = 84633600. Its totient is φ = 70625520.

The previous prime is 77461141. The next prime is 77461187. The reversal of 77461157 is 75116477.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 77461157 - 2⁴ = 77461141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77461157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77461187) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204194 + ... + 204572.

It is an arithmetic number, because the mean of its divisors is an integer number (5289600).

Almost surely, 2^77461157 is an apocalyptic number.

It is an amenable number.

77461157 is a deficient number, since it is larger than the sum of its proper divisors (7172443).

77461157 is a wasteful number, since it uses less digits than its factorization.

77461157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776.

The product of its digits is 41160, while the sum is 38.

The square root of 77461157 is about 8801.2020201788. The cubic root of 77461157 is about 426.2797082289.

The spelling of 77461157 in words is "seventy-seven million, four hundred sixty-one thousand, one hundred fifty-seven".