77649193748 has 24 divisors (see below), whose sum is σ = 155464180032. Its totient is φ = 33242698944.

The previous prime is 77649193733. The next prime is 77649193751. The reversal of 77649193748 is 84739194677.

It is a congruent number.

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, 1453586 + ... + 1506057.

It is an arithmetic number, because the mean of its divisors is an integer number (6477674168).

Almost surely, 2^77649193748 is an apocalyptic number.

It is an amenable number.

77649193748 is an abundant number, since it is smaller than the sum of its proper divisors (77814986284).

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

77649193748 is a wasteful number, since it uses less digits than its factorization.

77649193748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2960591 (or 2960589 counting only the distinct ones).

The product of its digits is 64012032, while the sum is 65.

The spelling of 77649193748 in words is "seventy-seven billion, six hundred forty-nine million, one hundred ninety-three thousand, seven hundred forty-eight".