72195456782 has 4 divisors (see below), whose sum is σ = 108293185176. Its totient is φ = 36097728390.

The previous prime is 72195456779. The next prime is 72195456833. The reversal of 72195456782 is 28765459127.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18048864194 + ... + 18048864197.

It is an arithmetic number, because the mean of its divisors is an integer number (27073296294).

Almost surely, 2^72195456782 is an apocalyptic number.

72195456782 is a deficient number, since it is larger than the sum of its proper divisors (36097728394).

72195456782 is a wasteful number, since it uses less digits than its factorization.

72195456782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36097728393.

The product of its digits is 8467200, while the sum is 56.

The spelling of 72195456782 in words is "seventy-two billion, one hundred ninety-five million, four hundred fifty-six thousand, seven hundred eighty-two".