77069815772 has 6 divisors (see below), whose sum is σ = 134872177608. Its totient is φ = 38534907884.

The previous prime is 77069815721. The next prime is 77069815777. The reversal of 77069815772 is 27751896077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77069815777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9633726968 + ... + 9633726975.

It is an arithmetic number, because the mean of its divisors is an integer number (22478696268).

Almost surely, 2^77069815772 is an apocalyptic number.

It is an amenable number.

77069815772 is a deficient number, since it is larger than the sum of its proper divisors (57802361836).

77069815772 is a wasteful number, since it uses less digits than its factorization.

77069815772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19267453947 (or 19267453945 counting only the distinct ones).

The product of its (nonzero) digits is 10372320, while the sum is 59.

The spelling of 77069815772 in words is "seventy-seven billion, sixty-nine million, eight hundred fifteen thousand, seven hundred seventy-two".