25143206340 has 72 divisors (see below), whose sum is σ = 81895024512. Its totient is φ = 5747017920.

The previous prime is 25143206323. The next prime is 25143206399. The reversal of 25143206340 is 4360234152.

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 = 25143206298 and 25143206307.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4273116 + ... + 4278995.

It is an arithmetic number, because the mean of its divisors is an integer number (1137430896).

Almost surely, 2^25143206340 is an apocalyptic number.

25143206340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25143206340 is an abundant number, since it is smaller than the sum of its proper divisors (56751818172).

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

25143206340 is a wasteful number, since it uses less digits than its factorization.

25143206340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8552137 (or 8552128 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The spelling of 25143206340 in words is "twenty-five billion, one hundred forty-three million, two hundred six thousand, three hundred forty".