77455697994 has 12 divisors (see below), whose sum is σ = 167820679026. Its totient is φ = 25818565992.

The previous prime is 77455697971. The next prime is 77455698011. The reversal of 77455697994 is 49979655477.

It can be written as a sum of positive squares in only one way, i.e., 76715150625 + 740547369 = 276975^2 + 27213^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2151547149 + ... + 2151547184.

Almost surely, 2^77455697994 is an apocalyptic number.

77455697994 is an abundant number, since it is smaller than the sum of its proper divisors (90364981032).

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

77455697994 is a wasteful number, since it uses less digits than its factorization.

77455697994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4303094341 (or 4303094338 counting only the distinct ones).

The product of its digits is 600112800, while the sum is 72.

The spelling of 77455697994 in words is "seventy-seven billion, four hundred fifty-five million, six hundred ninety-seven thousand, nine hundred ninety-four".