15698438464 has 14 divisors (see below), whose sum is σ = 31151588954. Its totient is φ = 7849219200.

The previous prime is 15698438411. The next prime is 15698438467. The reversal of 15698438464 is 46483489651.

It can be written as a sum of positive squares in only one way, i.e., 15673036864 + 25401600 = 125192^2 + 5040^2 .

It is a junction number, because it is equal to n+sod(n) for n = 15698438399 and 15698438408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15698438467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122643987 + ... + 122644114.

Almost surely, 2^15698438464 is an apocalyptic number.

It is an amenable number.

15698438464 is a deficient number, since it is larger than the sum of its proper divisors (15453150490).

15698438464 is an equidigital number, since it uses as much as digits as its factorization.

15698438464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245288113 (or 245288103 counting only the distinct ones).

The product of its digits is 19906560, while the sum is 58.

The spelling of 15698438464 in words is "fifteen billion, six hundred ninety-eight million, four hundred thirty-eight thousand, four hundred sixty-four".