77408697964 has 24 divisors (see below), whose sum is σ = 149828481488. Its totient is φ = 34761493440.

The previous prime is 77408697959. The next prime is 77408697973. The reversal of 77408697964 is 46979680477.

It is a self number, because there is not a number n which added to its sum of digits gives 77408697964.

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, 20114682 + ... + 20118529.

Almost surely, 2^77408697964 is an apocalyptic number.

77408697964 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

77408697964 is a deficient number, since it is larger than the sum of its proper divisors (72419783524).

77408697964 is a wasteful number, since it uses less digits than its factorization.

77408697964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40233265 (or 40233263 counting only the distinct ones).

The product of its (nonzero) digits is 128024064, while the sum is 67.

The spelling of 77408697964 in words is "seventy-seven billion, four hundred eight million, six hundred ninety-seven thousand, nine hundred sixty-four".