72784747670 has 16 divisors (see below), whose sum is σ = 131510697120. Its totient is φ = 29003198784.

The previous prime is 72784747663. The next prime is 72784747687. The reversal of 72784747670 is 7674748727.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13834775 + ... + 13840034.

It is an arithmetic number, because the mean of its divisors is an integer number (8219418570).

Almost surely, 2^72784747670 is an apocalyptic number.

72784747670 is a deficient number, since it is larger than the sum of its proper divisors (58725949450).

72784747670 is a wasteful number, since it uses less digits than its factorization.

72784747670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27675079.

The product of its (nonzero) digits is 25815552, while the sum is 59.

The spelling of 72784747670 in words is "seventy-two billion, seven hundred eighty-four million, seven hundred forty-seven thousand, six hundred seventy".