83732379557 has 6 divisors (see below), whose sum is σ = 86719266738. Its totient is φ = 80845055312.

The previous prime is 83732379553. The next prime is 83732379569. The reversal of 83732379557 is 75597323738.

It can be written as a sum of positive squares in 3 ways, for example, as 26311759681 + 57420619876 = 162209^2 + 239626^2 .

It is not a de Polignac number, because 83732379557 - 2² = 83732379553 is a prime.

It is a super-2 number, since 2×83732379557² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 83732379496 and 83732379505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83732379553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 49780598 + ... + 49782279.

It is an arithmetic number, because the mean of its divisors is an integer number (14453211123).

Almost surely, 2^83732379557 is an apocalyptic number.

It is an amenable number.

83732379557 is a deficient number, since it is larger than the sum of its proper divisors (2986887181).

83732379557 is an equidigital number, since it uses as much as digits as its factorization.

83732379557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99562935 (or 99562906 counting only the distinct ones).

The product of its digits is 33339600, while the sum is 59.

The spelling of 83732379557 in words is "eighty-three billion, seven hundred thirty-two million, three hundred seventy-nine thousand, five hundred fifty-seven".