12515770554 has 128 divisors (see below), whose sum is σ = 31185715200. Its totient is φ = 3267786240.

The previous prime is 12515770543. The next prime is 12515770559. The reversal of 12515770554 is 45507751521.

It is a super-3 number, since 3×12515770554³ (a number of 31 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (12515770559) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10117224 + ... + 10118460.

It is an arithmetic number, because the mean of its divisors is an integer number (243638400).

Almost surely, 2^12515770554 is an apocalyptic number.

12515770554 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12515770554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15592857600).

12515770554 is an abundant number, since it is smaller than the sum of its proper divisors (18669944646).

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

12515770554 is a wasteful number, since it uses less digits than its factorization.

12515770554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708.

The product of its (nonzero) digits is 245000, while the sum is 42.

The spelling of 12515770554 in words is "twelve billion, five hundred fifteen million, seven hundred seventy thousand, five hundred fifty-four".