77861168 has 40 divisors (see below), whose sum is σ = 188083200. Its totient is φ = 30335040.

The previous prime is 77861159. The next prime is 77861171. The reversal of 77861168 is 86116877.

It is a super-2 number, since 2×77861168² = 12124722964648448, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30368 + ... + 32831.

It is an arithmetic number, because the mean of its divisors is an integer number (4702080).

Almost surely, 2^77861168 is an apocalyptic number.

It is an amenable number.

77861168 is an abundant number, since it is smaller than the sum of its proper divisors (110222032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77861168 is a wasteful number, since it uses less digits than its factorization.

77861168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63225 (or 63219 counting only the distinct ones).

The product of its digits is 112896, while the sum is 44.

The square root of 77861168 is about 8823.8975515358. The cubic root of 77861168 is about 427.0122211473.

The spelling of 77861168 in words is "seventy-seven million, eight hundred sixty-one thousand, one hundred sixty-eight".