15977320042896 has 45 divisors (see below), whose sum is σ = 44714439636321. Its totient is φ = 5325757358976.

The previous prime is 15977320042891. The next prime is 15977320042913. The reversal of 15977320042896 is 69824002377951.

The square root of 15977320042896 is 3997164.

It is a perfect power (a square), and thus also a powerful number.

15977320042896 is a `hidden beast` number, since 1 + 5 + 97 + 7 + 32 + 0 + 0 + 428 + 96 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14652205952400 + 1325114090496 = 3827820^2 + 1151136^2 .

It is not an unprimeable number, because it can be changed into a prime (15977320042891) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 47799420 + ... + 48132516.

It is a 2-persistent number, because it is pandigital, and so is 2⋅15977320042896 = 31954640085792, but 3⋅15977320042896 = 47931960128688 is not.

Almost surely, 2^{15977320042896} is an apocalyptic number.

15977320042896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

15977320042896 is the 3997164-th square number.

It is an amenable number.

15977320042896 is an abundant number, since it is smaller than the sum of its proper divisors (28737119593425).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15977320042896 is an frugal number, since it uses more digits than its factorization.

15977320042896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666208 (or 333102 counting only the distinct ones).

The product of its (nonzero) digits is 45722880, while the sum is 63.

The spelling of 15977320042896 in words is "fifteen trillion, nine hundred seventy-seven billion, three hundred twenty million, forty-two thousand, eight hundred ninety-six".