77145692 has 24 divisors (see below), whose sum is σ = 145678176. Its totient is φ = 35535168.

The previous prime is 77145671. The next prime is 77145697. The reversal of 77145692 is 29654177.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77145697) 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, 32498 + ... + 34790.

It is an arithmetic number, because the mean of its divisors is an integer number (6069924).

Almost surely, 2^77145692 is an apocalyptic number.

It is an amenable number.

77145692 is a deficient number, since it is larger than the sum of its proper divisors (68532484).

77145692 is a wasteful number, since it uses less digits than its factorization.

77145692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2957 (or 2955 counting only the distinct ones).

The product of its digits is 105840, while the sum is 41.

The square root of 77145692 is about 8783.2620363963. The cubic root of 77145692 is about 425.7002380285.

The spelling of 77145692 in words is "seventy-seven million, one hundred forty-five thousand, six hundred ninety-two".