72000776776 has 8 divisors (see below), whose sum is σ = 135001456470. Its totient is φ = 36000388384.

The previous prime is 72000776761. The next prime is 72000776779. The reversal of 72000776776 is 67767700027.

It can be written as a sum of positive squares in only one way, i.e., 71756479876 + 244296900 = 267874^2 + 15630^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×72000776776² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72000776779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4500048541 + ... + 4500048556.

Almost surely, 2^72000776776 is an apocalyptic number.

It is an amenable number.

72000776776 is a deficient number, since it is larger than the sum of its proper divisors (63000679694).

72000776776 is a wasteful number, since it uses less digits than its factorization.

72000776776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9000097103 (or 9000097099 counting only the distinct ones).

The product of its (nonzero) digits is 1210104, while the sum is 49.

The spelling of 72000776776 in words is "seventy-two billion, seven hundred seventy-six thousand, seven hundred seventy-six".