12699450648 has 32 divisors (see below), whose sum is σ = 35276252400. Its totient is φ = 4233150144.

The previous prime is 12699450553. The next prime is 12699450649. The reversal of 12699450648 is 84605499621.

12699450648 is a `hidden beast` number, since 1 + 2 + 6 + 9 + 94 + 506 + 48 = 666.

It is a super-2 number, since 2×12699450648² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 12699450594 and 12699450603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12699450649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29396661 + ... + 29397092.

Almost surely, 2^12699450648 is an apocalyptic number.

12699450648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12699450648 is an abundant number, since it is smaller than the sum of its proper divisors (22576801752).

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

12699450648 is a wasteful number, since it uses less digits than its factorization.

12699450648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58793768 (or 58793758 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 12699450648 in words is "twelve billion, six hundred ninety-nine million, four hundred fifty thousand, six hundred forty-eight".