72645970934 has 4 divisors (see below), whose sum is σ = 108968956404. Its totient is φ = 36322985466.

The previous prime is 72645970933. The next prime is 72645970961. The reversal of 72645970934 is 43907954627.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 72645970934.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72645970931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18161492732 + ... + 18161492735.

It is an arithmetic number, because the mean of its divisors is an integer number (27242239101).

Almost surely, 2^72645970934 is an apocalyptic number.

72645970934 is a deficient number, since it is larger than the sum of its proper divisors (36322985470).

72645970934 is a wasteful number, since it uses less digits than its factorization.

72645970934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36322985469.

The product of its (nonzero) digits is 11430720, while the sum is 56.

The spelling of 72645970934 in words is "seventy-two billion, six hundred forty-five million, nine hundred seventy thousand, nine hundred thirty-four".