13963561380 has 96 divisors (see below), whose sum is σ = 43702606080. Its totient is φ = 3701295360.

The previous prime is 13963561369. The next prime is 13963561427. The reversal of 13963561380 is 8316536931.

13963561380 is a `hidden beast` number, since 1 + 3 + 9 + 6 + 3 + 561 + 3 + 80 = 666.

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 31 ways as a sum of consecutive naturals, for example, 12760 + ... + 167600.

It is an arithmetic number, because the mean of its divisors is an integer number (455235480).

Almost surely, 2^13963561380 is an apocalyptic number.

13963561380 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 13963561380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21851303040).

13963561380 is an abundant number, since it is smaller than the sum of its proper divisors (29739044700).

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

13963561380 is a wasteful number, since it uses less digits than its factorization.

13963561380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155026 (or 155018 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 13963561380 in words is "thirteen billion, nine hundred sixty-three million, five hundred sixty-one thousand, three hundred eighty".