12616204540 has 24 divisors (see below), whose sum is σ = 27348676992. Its totient is φ = 4883691840.

The previous prime is 12616204519. The next prime is 12616204583. The reversal of 12616204540 is 4540261621.

It is a happy number.

It is a super-2 number, since 2×12616204540² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10173739 + ... + 10174978.

It is an arithmetic number, because the mean of its divisors is an integer number (1139528208).

Almost surely, 2^12616204540 is an apocalyptic number.

12616204540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12616204540 is an abundant number, since it is smaller than the sum of its proper divisors (14732472452).

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

12616204540 is a wasteful number, since it uses less digits than its factorization.

12616204540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20348757 (or 20348755 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

It can be divided in two parts, 12616 and 204540, that added together give a square (217156 = 466²).

The spelling of 12616204540 in words is "twelve billion, six hundred sixteen million, two hundred four thousand, five hundred forty".