84721511992 has 32 divisors (see below), whose sum is σ = 176971334400. Its totient is φ = 37753881984.

The previous prime is 84721511983. The next prime is 84721511999. The reversal of 84721511992 is 29911512748.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84721511999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14042328 + ... + 14048359.

It is an arithmetic number, because the mean of its divisors is an integer number (5530354200).

Almost surely, 2^84721511992 is an apocalyptic number.

It is an amenable number.

84721511992 is an abundant number, since it is smaller than the sum of its proper divisors (92249822408).

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

84721511992 is a wasteful number, since it uses less digits than its factorization.

84721511992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28090735 (or 28090731 counting only the distinct ones).

The product of its digits is 362880, while the sum is 49.

The spelling of 84721511992 in words is "eighty-four billion, seven hundred twenty-one million, five hundred eleven thousand, nine hundred ninety-two".