15978603201 has 16 divisors (see below), whose sum is σ = 23250137088. Its totient is φ = 9680446800.

The previous prime is 15978603191. The next prime is 15978603209. The reversal of 15978603201 is 10230687951.

It is not a de Polignac number, because 15978603201 - 2¹⁰ = 15978602177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15978603209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3816 + ... + 178806.

It is an arithmetic number, because the mean of its divisors is an integer number (1453133568).

Almost surely, 2^15978603201 is an apocalyptic number.

15978603201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15978603201 is a deficient number, since it is larger than the sum of its proper divisors (7271533887).

15978603201 is a wasteful number, since it uses less digits than its factorization.

15978603201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177772.

The product of its (nonzero) digits is 90720, while the sum is 42.

It can be divided in two parts, 1597860 and 3201, that added together give a palindrome (1601061).

The spelling of 15978603201 in words is "fifteen billion, nine hundred seventy-eight million, six hundred three thousand, two hundred one".