25221398190240 has 96 divisors (see below), whose sum is σ = 90797033496960. Its totient is φ = 5764891014144.

The previous prime is 25221398190067. The next prime is 25221398190269. The reversal of 25221398190240 is 4209189312252.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×25221398190240² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 25221398190240.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3753180895 + ... + 3753187614.

It is an arithmetic number, because the mean of its divisors is an integer number (945802432260).

Almost surely, 2^{25221398190240} is an apocalyptic number.

25221398190240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25221398190240 is an abundant number, since it is smaller than the sum of its proper divisors (65575635306720).

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

25221398190240 is a wasteful number, since it uses less digits than its factorization.

25221398190240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7506368534 (or 7506368526 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 48.

The spelling of 25221398190240 in words is "twenty-five trillion, two hundred twenty-one billion, three hundred ninety-eight million, one hundred ninety thousand, two hundred forty".