13181402640 has 160 divisors (see below), whose sum is σ = 47262974976. Its totient is φ = 2976560640.

The previous prime is 13181402623. The next prime is 13181402657. The reversal of 13181402640 is 4620418131.

It is an interprime number because it is at equal distance from previous prime (13181402623) and next prime (13181402657).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 13181402598 and 13181402607.

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, 92175 + ... + 186705.

Almost surely, 2^13181402640 is an apocalyptic number.

13181402640 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 13181402640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23631487488).

13181402640 is an abundant number, since it is smaller than the sum of its proper divisors (34081572336).

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

13181402640 is a wasteful number, since it uses less digits than its factorization.

13181402640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94637 (or 94631 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The spelling of 13181402640 in words is "thirteen billion, one hundred eighty-one million, four hundred two thousand, six hundred forty".