1959991552 has 108 divisors (see below), whose sum is σ = 4201444044. Its totient is φ = 911933440.

The previous prime is 1959991513. The next prime is 1959991567. The reversal of 1959991552 is 2551999591.

It can be written as a sum of positive squares in 2 ways, for example, as 380406016 + 1579585536 = 19504^2 + 39744^2 .

It is a super-2 number, since 2×1959991552² = 7683133767822737408, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1959991493 and 1959991502.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5552208 + ... + 5552560.

Almost surely, 2^1959991552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1959991552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2100722022).

1959991552 is an abundant number, since it is smaller than the sum of its proper divisors (2241452492).

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

1959991552 is an equidigital number, since it uses as much as digits as its factorization.

1959991552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456 (or 419 counting only the distinct ones).

The product of its digits is 1640250, while the sum is 55.

The square root of 1959991552 is about 44271.7918318200. The cubic root of 1959991552 is about 1251.4631511095.

The spelling of 1959991552 in words is "one billion, nine hundred fifty-nine million, nine hundred ninety-one thousand, five hundred fifty-two".