15870492397 has 8 divisors (see below), whose sum is σ = 16268428800. Its totient is φ = 15475067184.

The previous prime is 15870492383. The next prime is 15870492457. The reversal of 15870492397 is 79329407851.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15870492397 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 (15870492347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 614997 + ... + 640282.

It is an arithmetic number, because the mean of its divisors is an integer number (2033553600).

Almost surely, 2^15870492397 is an apocalyptic number.

It is an amenable number.

15870492397 is a deficient number, since it is larger than the sum of its proper divisors (397936403).

15870492397 is a wasteful number, since it uses less digits than its factorization.

15870492397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1255595.

The product of its (nonzero) digits is 3810240, while the sum is 55.

The spelling of 15870492397 in words is "fifteen billion, eight hundred seventy million, four hundred ninety-two thousand, three hundred ninety-seven".