25190609940 has 72 divisors (see below), whose sum is σ = 76435107840. Its totient is φ = 6715422144.

The previous prime is 25190609921. The next prime is 25190610017. The reversal of 25190609940 is 4990609152.

25190609940 is a `hidden beast` number, since 2 + 519 + 0 + 6 + 0 + 99 + 40 = 666.

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

It is a congruent number.

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, 615021 + ... + 654699.

It is an arithmetic number, because the mean of its divisors is an integer number (1061598720).

Almost surely, 2^25190609940 is an apocalyptic number.

25190609940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is a pronic number, being equal to 158715×158716.

It is an amenable number.

25190609940 is an abundant number, since it is smaller than the sum of its proper divisors (51244497900).

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

25190609940 is a wasteful number, since it uses less digits than its factorization.

25190609940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43221 (or 43216 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The spelling of 25190609940 in words is "twenty-five billion, one hundred ninety million, six hundred nine thousand, nine hundred forty".