77000007764 has 6 divisors (see below), whose sum is σ = 134750013594. Its totient is φ = 38500003880.

The previous prime is 77000007737. The next prime is 77000007793. The reversal of 77000007764 is 46770000077.

It can be written as a sum of positive squares in only one way, i.e., 56338820164 + 20661187600 = 237358^2 + 143740^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9625000967 + ... + 9625000974.

It is an arithmetic number, because the mean of its divisors is an integer number (22458335599).

Almost surely, 2^77000007764 is an apocalyptic number.

It is an amenable number.

77000007764 is a deficient number, since it is larger than the sum of its proper divisors (57750005830).

77000007764 is a wasteful number, since it uses less digits than its factorization.

77000007764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19250001945 (or 19250001943 counting only the distinct ones).

The product of its (nonzero) digits is 57624, while the sum is 38.

The spelling of 77000007764 in words is "seventy-seven billion, seven thousand, seven hundred sixty-four".