15983161380 has 480 divisors, whose sum is σ = 55851586560. Its totient is φ = 3808062720.

The previous prime is 15983161373. The next prime is 15983161393. The reversal of 15983161380 is 8316138951.

It is a happy number.

It is a super-2 number, since 2×15983161380² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 75749475 + ... + 75749685.

It is an arithmetic number, because the mean of its divisors is an integer number (116357472).

Almost surely, 2^15983161380 is an apocalyptic number.

15983161380 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 15983161380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27925793280).

15983161380 is an abundant number, since it is smaller than the sum of its proper divisors (39868425180).

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

15983161380 is a wasteful number, since it uses less digits than its factorization.

15983161380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381 (or 370 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The spelling of 15983161380 in words is "fifteen billion, nine hundred eighty-three million, one hundred sixty-one thousand, three hundred eighty".