11896787520 has 140 divisors (see below), whose sum is σ = 42319058364. Its totient is φ = 3172469760.

The previous prime is 11896787491. The next prime is 11896787579. The reversal of 11896787520 is 2578769811.

It can be written as a sum of positive squares in 2 ways, for example, as 6375703104 + 5521084416 = 79848^2 + 74304^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 203571 + ... + 255410.

Almost surely, 2^11896787520 is an apocalyptic number.

11896787520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11896787520 is an abundant number, since it is smaller than the sum of its proper divisors (30422270844).

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

11896787520 is an equidigital number, since it uses as much as digits as its factorization.

11896787520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459010 (or 458991 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 54.

The spelling of 11896787520 in words is "eleven billion, eight hundred ninety-six million, seven hundred eighty-seven thousand, five hundred twenty".