15977291376 has 80 divisors (see below), whose sum is σ = 42644413440. Its totient is φ = 5149332480.

The previous prime is 15977291371. The next prime is 15977291377. The reversal of 15977291376 is 67319277951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15977291371) 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, 1904920 + ... + 1913288.

It is an arithmetic number, because the mean of its divisors is an integer number (533055168).

Almost surely, 2^15977291376 is an apocalyptic number.

15977291376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15977291376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21322206720).

15977291376 is an abundant number, since it is smaller than the sum of its proper divisors (26667122064).

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

15977291376 is a wasteful number, since it uses less digits than its factorization.

15977291376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9694 (or 9688 counting only the distinct ones).

The product of its digits is 5000940, while the sum is 57.

The spelling of 15977291376 in words is "fifteen billion, nine hundred seventy-seven million, two hundred ninety-one thousand, three hundred seventy-six".