12725436540 has 24 divisors (see below), whose sum is σ = 35631222480. Its totient is φ = 3393449728.

The previous prime is 12725436539. The next prime is 12725436551. The reversal of 12725436540 is 4563452721.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

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, 106045245 + ... + 106045364.

It is an arithmetic number, because the mean of its divisors is an integer number (1484634270).

Almost surely, 2^12725436540 is an apocalyptic number.

12725436540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12725436540 is an abundant number, since it is smaller than the sum of its proper divisors (22905785940).

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

12725436540 is a wasteful number, since it uses less digits than its factorization.

12725436540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212090621 (or 212090619 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 39.

The spelling of 12725436540 in words is "twelve billion, seven hundred twenty-five million, four hundred thirty-six thousand, five hundred forty".