77157086 has 4 divisors (see below), whose sum is σ = 115735632. Its totient is φ = 38578542.

The previous prime is 77157083. The next prime is 77157103. The reversal of 77157086 is 68075177.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68075177 = 457 ⋅148961.

It is a super-2 number, since 2×77157086² = 11906431840022792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77157083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19289270 + ... + 19289273.

It is an arithmetic number, because the mean of its divisors is an integer number (28933908).

Almost surely, 2^77157086 is an apocalyptic number.

77157086 is a deficient number, since it is larger than the sum of its proper divisors (38578546).

77157086 is a wasteful number, since it uses less digits than its factorization.

77157086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38578545.

The product of its (nonzero) digits is 82320, while the sum is 41.

The square root of 77157086 is about 8783.9106325144. The cubic root of 77157086 is about 425.7211948684.

The spelling of 77157086 in words is "seventy-seven million, one hundred fifty-seven thousand, eighty-six".