15801677680 has 80 divisors (see below), whose sum is σ = 37176638400. Its totient is φ = 6245683200.

The previous prime is 15801677663. The next prime is 15801677687. The reversal of 15801677680 is 8677610851.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×15801677680² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15801677687) 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, 3494461 + ... + 3498979.

It is an arithmetic number, because the mean of its divisors is an integer number (464707980).

Almost surely, 2^15801677680 is an apocalyptic number.

15801677680 is a gapful number since it is divisible by the number (10) 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 15801677680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18588319200).

15801677680 is an abundant number, since it is smaller than the sum of its proper divisors (21374960720).

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

15801677680 is a wasteful number, since it uses less digits than its factorization.

15801677680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5042 (or 5036 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 49.

The spelling of 15801677680 in words is "fifteen billion, eight hundred one million, six hundred seventy-seven thousand, six hundred eighty".