12651527640 has 64 divisors (see below), whose sum is σ = 38345902560. Its totient is φ = 3338956800.

The previous prime is 12651527627. The next prime is 12651527641. The reversal of 12651527640 is 4672515621.

It is a super-2 number, since 2×12651527640² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12651527641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 531811 + ... + 555090.

Almost surely, 2^12651527640 is an apocalyptic number.

12651527640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12651527640 is an abundant number, since it is smaller than the sum of its proper divisors (25694374920).

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

12651527640 is a wasteful number, since it uses less digits than its factorization.

12651527640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087012 (or 1087008 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 39.

The spelling of 12651527640 in words is "twelve billion, six hundred fifty-one million, five hundred twenty-seven thousand, six hundred forty".