12619661640 has 64 divisors (see below), whose sum is σ = 37867435200. Its totient is φ = 3364492032.

The previous prime is 12619661609. The next prime is 12619661683. The reversal of 12619661640 is 4616691621.

It is a junction number, because it is equal to n+sod(n) for n = 12619661592 and 12619661601.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 714759 + ... + 732201.

It is an arithmetic number, because the mean of its divisors is an integer number (591678675).

Almost surely, 2^12619661640 is an apocalyptic number.

12619661640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12619661640 is an abundant number, since it is smaller than the sum of its proper divisors (25247773560).

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

12619661640 is a wasteful number, since it uses less digits than its factorization.

12619661640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23486 (or 23482 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The spelling of 12619661640 in words is "twelve billion, six hundred nineteen million, six hundred sixty-one thousand, six hundred forty".