15641898196 has 6 divisors (see below), whose sum is σ = 27373321850. Its totient is φ = 7820949096.

The previous prime is 15641898157. The next prime is 15641898197. The reversal of 15641898196 is 69189814651.

It can be written as a sum of positive squares in only one way, i.e., 14596022596 + 1045875600 = 120814^2 + 32340^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 15641898196.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15641898197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1955237271 + ... + 1955237278.

Almost surely, 2^15641898196 is an apocalyptic number.

It is an amenable number.

15641898196 is a deficient number, since it is larger than the sum of its proper divisors (11731423654).

15641898196 is a wasteful number, since it uses less digits than its factorization.

15641898196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3910474553 (or 3910474551 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 58.

The spelling of 15641898196 in words is "fifteen billion, six hundred forty-one million, eight hundred ninety-eight thousand, one hundred ninety-six".