77149892464 has 40 divisors (see below), whose sum is σ = 160012080000. Its totient is φ = 35925276096.

The previous prime is 77149892447. The next prime is 77149892467. The reversal of 77149892464 is 46429894177.

It is a Smith number, since the sum of its digits (61) 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 (77149892467) 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, 2132764 + ... + 2168635.

It is an arithmetic number, because the mean of its divisors is an integer number (4000302000).

Almost surely, 2^77149892464 is an apocalyptic number.

It is an amenable number.

77149892464 is an abundant number, since it is smaller than the sum of its proper divisors (82862187536).

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

77149892464 is a wasteful number, since it uses less digits than its factorization.

77149892464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4301485 (or 4301479 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 61.

The spelling of 77149892464 in words is "seventy-seven billion, one hundred forty-nine million, eight hundred ninety-two thousand, four hundred sixty-four".