15977390401 has 8 divisors (see below), whose sum is σ = 18290986560. Its totient is φ = 13671572208.

The previous prime is 15977390399. The next prime is 15977390411. The reversal of 15977390401 is 10409377951.

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

It is not a de Polignac number, because 15977390401 - 2¹ = 15977390399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15977390411) 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, 1940086 + ... + 1948303.

It is an arithmetic number, because the mean of its divisors is an integer number (2286373320).

Almost surely, 2^15977390401 is an apocalyptic number.

It is an amenable number.

15977390401 is a deficient number, since it is larger than the sum of its proper divisors (2313596159).

15977390401 is an equidigital number, since it uses as much as digits as its factorization.

15977390401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3888983.

The product of its (nonzero) digits is 238140, while the sum is 46.

The spelling of 15977390401 in words is "fifteen billion, nine hundred seventy-seven million, three hundred ninety thousand, four hundred one".