83391151572 has 18 divisors (see below), whose sum is σ = 210794299898. Its totient is φ = 27797050512.

The previous prime is 83391151537. The next prime is 83391151631. The reversal of 83391151572 is 27515119338.

It can be written as a sum of positive squares in only one way, i.e., 74876660496 + 8514491076 = 273636^2 + 92274^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1158210403 + ... + 1158210474.

Almost surely, 2^83391151572 is an apocalyptic number.

It is an amenable number.

83391151572 is an abundant number, since it is smaller than the sum of its proper divisors (127403148326).

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

83391151572 is a wasteful number, since it uses less digits than its factorization.

83391151572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2316420887 (or 2316420882 counting only the distinct ones).

The product of its digits is 226800, while the sum is 45.

The spelling of 83391151572 in words is "eighty-three billion, three hundred ninety-one million, one hundred fifty-one thousand, five hundred seventy-two".