12625391640 has 32 divisors (see below), whose sum is σ = 37876175280. Its totient is φ = 3366771072.

The previous prime is 12625391609. The next prime is 12625391663. The reversal of 12625391640 is 4619352621.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52605679 + ... + 52605918.

Almost surely, 2^12625391640 is an apocalyptic number.

12625391640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12625391640 is an abundant number, since it is smaller than the sum of its proper divisors (25250783640).

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

12625391640 is a wasteful number, since it uses less digits than its factorization.

12625391640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105211611 (or 105211607 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The spelling of 12625391640 in words is "twelve billion, six hundred twenty-five million, three hundred ninety-one thousand, six hundred forty".