15719477397 has 64 divisors (see below), whose sum is σ = 24996335616. Its totient is φ = 8688430080.

The previous prime is 15719477387. The next prime is 15719477413. The reversal of 15719477397 is 79377491751.

It is not a de Polignac number, because 15719477397 - 2⁴ = 15719477381 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15719477397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15719477377) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8584272 + ... + 8586102.

It is an arithmetic number, because the mean of its divisors is an integer number (390567744).

Almost surely, 2^15719477397 is an apocalyptic number.

15719477397 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

15719477397 is a deficient number, since it is larger than the sum of its proper divisors (9276858219).

15719477397 is a wasteful number, since it uses less digits than its factorization.

15719477397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2450.

The product of its digits is 11668860, while the sum is 60.

The spelling of 15719477397 in words is "fifteen billion, seven hundred nineteen million, four hundred seventy-seven thousand, three hundred ninety-seven".