1151311455520 has 24 divisors (see below), whose sum is σ = 2719973314044. Its totient is φ = 460524582144.

The previous prime is 1151311455517. The next prime is 1151311455523. The reversal of 1151311455520 is 255541131511.

It is an interprime number because it is at equal distance from previous prime (1151311455517) and next prime (1151311455523).

It can be written as a sum of positive squares in 2 ways, for example, as 1052355912336 + 98955543184 = 1025844^2 + 314572^2 .

It is a super-2 number, since 2×1151311455520² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1151311455523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3597848139 + ... + 3597848458.

Almost surely, 2^{1151311455520} is an apocalyptic number.

1151311455520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1151311455520 is an abundant number, since it is smaller than the sum of its proper divisors (1568661858524).

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

1151311455520 is an equidigital number, since it uses as much as digits as its factorization.

1151311455520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7195696612 (or 7195696604 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 34.

The spelling of 1151311455520 in words is "one trillion, one hundred fifty-one billion, three hundred eleven million, four hundred fifty-five thousand, five hundred twenty".