15698769949 has 4 divisors (see below), whose sum is σ = 15811710880. Its totient is φ = 15585829020.

The previous prime is 15698769941. The next prime is 15698769959. The reversal of 15698769949 is 94996789651.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15698769949 - 2³ = 15698769941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15698769941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56470257 + ... + 56470534.

It is an arithmetic number, because the mean of its divisors is an integer number (3952927720).

Almost surely, 2^15698769949 is an apocalyptic number.

It is an amenable number.

15698769949 is a deficient number, since it is larger than the sum of its proper divisors (112940931).

15698769949 is a wasteful number, since it uses less digits than its factorization.

15698769949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112940930.

The product of its digits is 264539520, while the sum is 73.

The spelling of 15698769949 in words is "fifteen billion, six hundred ninety-eight million, seven hundred sixty-nine thousand, nine hundred forty-nine".