83261177772 has 12 divisors (see below), whose sum is σ = 194276081496. Its totient is φ = 27753725920.

The previous prime is 83261177723. The next prime is 83261177773. The reversal of 83261177772 is 27777116238.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (83261177773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3469215729 + ... + 3469215752.

It is an arithmetic number, because the mean of its divisors is an integer number (16189673458).

Almost surely, 2^83261177772 is an apocalyptic number.

It is an amenable number.

83261177772 is an abundant number, since it is smaller than the sum of its proper divisors (111014903724).

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

83261177772 is a wasteful number, since it uses less digits than its factorization.

83261177772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6938431488 (or 6938431486 counting only the distinct ones).

The product of its digits is 1382976, while the sum is 51.

The spelling of 83261177772 in words is "eighty-three billion, two hundred sixty-one million, one hundred seventy-seven thousand, seven hundred seventy-two".