72640351006 has 32 divisors (see below), whose sum is σ = 112125767040. Its totient is φ = 35284294656.

The previous prime is 72640350931. The next prime is 72640351057. The reversal of 72640351006 is 60015304627.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2637700 + ... + 2665096.

It is an arithmetic number, because the mean of its divisors is an integer number (3503930220).

Almost surely, 2^72640351006 is an apocalyptic number.

72640351006 is a deficient number, since it is larger than the sum of its proper divisors (39485416034).

72640351006 is a wasteful number, since it uses less digits than its factorization.

72640351006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27748.

The product of its (nonzero) digits is 30240, while the sum is 34.

The spelling of 72640351006 in words is "seventy-two billion, six hundred forty million, three hundred fifty-one thousand, six".