77156361 has 8 divisors (see below), whose sum is σ = 114305760. Its totient is φ = 51437556.

The previous prime is 77156351. The next prime is 77156363. The reversal of 77156361 is 16365177.

77156361 is a `hidden beast` number, since 7 + 7 + 15 + 636 + 1 = 666.

It is not a de Polignac number, because 77156361 - 2⁹ = 77155849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77156363) 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, 1428795 + ... + 1428848.

It is an arithmetic number, because the mean of its divisors is an integer number (14288220).

Almost surely, 2^77156361 is an apocalyptic number.

It is an amenable number.

77156361 is a deficient number, since it is larger than the sum of its proper divisors (37149399).

77156361 is a wasteful number, since it uses less digits than its factorization.

77156361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2857652 (or 2857646 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

The square root of 77156361 is about 8783.8693637827. The cubic root of 77156361 is about 425.7198614465.

The spelling of 77156361 in words is "seventy-seven million, one hundred fifty-six thousand, three hundred sixty-one".