77963193720 has 48 divisors (see below), whose sum is σ = 253380380760. Its totient is φ = 20790184896.

The previous prime is 77963193667. The next prime is 77963193767. The reversal of 77963193720 is 2739136977.

It is a happy number.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108281854 + ... + 108282573.

Almost surely, 2^77963193720 is an apocalyptic number.

It is an amenable number.

77963193720 is an abundant number, since it is smaller than the sum of its proper divisors (175417187040).

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

77963193720 is a wasteful number, since it uses less digits than its factorization.

77963193720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216564444 (or 216564437 counting only the distinct ones).

The product of its (nonzero) digits is 3000564, while the sum is 54.

The spelling of 77963193720 in words is "seventy-seven billion, nine hundred sixty-three million, one hundred ninety-three thousand, seven hundred twenty".