15861342386990 has 8 divisors (see below), whose sum is σ = 28550416296600. Its totient is φ = 6344536954792.

The previous prime is 15861342386971. The next prime is 15861342387049. The reversal of 15861342386990 is 9968324316851.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 793067119340 + ... + 793067119359.

It is an arithmetic number, because the mean of its divisors is an integer number (3568802037075).

Almost surely, 2^{15861342386990} is an apocalyptic number.

15861342386990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15861342386990 is a deficient number, since it is larger than the sum of its proper divisors (12689073909610).

15861342386990 is a wasteful number, since it uses less digits than its factorization.

15861342386990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1586134238706.

The product of its (nonzero) digits is 67184640, while the sum is 65.

The spelling of 15861342386990 in words is "fifteen trillion, eight hundred sixty-one billion, three hundred forty-two million, three hundred eighty-six thousand, nine hundred ninety".