84815721372 has 48 divisors (see below), whose sum is σ = 204340505600. Its totient is φ = 27352788480.

The previous prime is 84815721329. The next prime is 84815721379. The reversal of 84815721372 is 27312751848.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84815721379) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1508379 + ... + 1563597.

Almost surely, 2^84815721372 is an apocalyptic number.

It is an amenable number.

84815721372 is an abundant number, since it is smaller than the sum of its proper divisors (119524784228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

84815721372 is a wasteful number, since it uses less digits than its factorization.

84815721372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59386 (or 59384 counting only the distinct ones).

The product of its digits is 752640, while the sum is 48.

The spelling of 84815721372 in words is "eighty-four billion, eight hundred fifteen million, seven hundred twenty-one thousand, three hundred seventy-two".