77764997902 has 16 divisors (see below), whose sum is σ = 116929914480. Its totient is φ = 38788468992.

The previous prime is 77764997899. The next prime is 77764997903. The reversal of 77764997902 is 20979946777.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77764997903) 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, 1444749 + ... + 1497607.

It is an arithmetic number, because the mean of its divisors is an integer number (7308119655).

Almost surely, 2^77764997902 is an apocalyptic number.

77764997902 is a deficient number, since it is larger than the sum of its proper divisors (39164916578).

77764997902 is a wasteful number, since it uses less digits than its factorization.

77764997902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54627.

The product of its (nonzero) digits is 84015792, while the sum is 67.

The spelling of 77764997902 in words is "seventy-seven billion, seven hundred sixty-four million, nine hundred ninety-seven thousand, nine hundred two".