72605615776 has 24 divisors (see below), whose sum is σ = 143143961940. Its totient is φ = 36251593728.

The previous prime is 72605615737. The next prime is 72605615777. The reversal of 72605615776 is 67751650627.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 71256963600 + 1348652176 = 266940^2 + 36724^2 .

It is not an unprimeable number, because it can be changed into a prime (72605615777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1577401 + ... + 1622776.

Almost surely, 2^72605615776 is an apocalyptic number.

It is an amenable number.

72605615776 is a deficient number, since it is larger than the sum of its proper divisors (70538346164).

72605615776 is a wasteful number, since it uses less digits than its factorization.

72605615776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3200896 (or 3200888 counting only the distinct ones).

The product of its (nonzero) digits is 3704400, while the sum is 52.

The spelling of 72605615776 in words is "seventy-two billion, six hundred five million, six hundred fifteen thousand, seven hundred seventy-six".