15990393601 has 8 divisors (see below), whose sum is σ = 19680484544. Its totient is φ = 12651739920.

The previous prime is 15990393589. The next prime is 15990393649. The reversal of 15990393601 is 10639309951.

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

It is a cyclic number.

It is not a de Polignac number, because 15990393601 - 2¹⁵ = 15990360833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15990393691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87859215 + ... + 87859396.

It is an arithmetic number, because the mean of its divisors is an integer number (2460060568).

Almost surely, 2^15990393601 is an apocalyptic number.

It is an amenable number.

15990393601 is a deficient number, since it is larger than the sum of its proper divisors (3690090943).

15990393601 is a wasteful number, since it uses less digits than its factorization.

15990393601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175718631.

The product of its (nonzero) digits is 196830, while the sum is 46.

The spelling of 15990393601 in words is "fifteen billion, nine hundred ninety million, three hundred ninety-three thousand, six hundred one".