12801642550 has 24 divisors (see below), whose sum is σ = 24632128800. Its totient is φ = 4944082080.

The previous prime is 12801642499. The next prime is 12801642551. The reversal of 12801642550 is 5524610821.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12801642551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4412910 + ... + 4415809.

It is an arithmetic number, because the mean of its divisors is an integer number (1026338700).

Almost surely, 2^12801642550 is an apocalyptic number.

12801642550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12801642550 is a deficient number, since it is larger than the sum of its proper divisors (11830486250).

12801642550 is a wasteful number, since it uses less digits than its factorization.

12801642550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8828760 (or 8828755 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 34.

The spelling of 12801642550 in words is "twelve billion, eight hundred one million, six hundred forty-two thousand, five hundred fifty".