25211913450 has 96 divisors (see below), whose sum is σ = 65452703616. Its totient is φ = 6410300160.

The previous prime is 25211913449. The next prime is 25211913451. The reversal of 25211913450 is 5431911252.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25211913449) and next prime (25211913451).

It is not an unprimeable number, because it can be changed into a prime (25211913451) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1082124 + ... + 1105176.

It is an arithmetic number, because the mean of its divisors is an integer number (681798996).

Almost surely, 2^25211913450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25211913450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32726351808).

25211913450 is an abundant number, since it is smaller than the sum of its proper divisors (40240790166).

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

25211913450 is a wasteful number, since it uses less digits than its factorization.

25211913450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23408 (or 23403 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 33.

The spelling of 25211913450 in words is "twenty-five billion, two hundred eleven million, nine hundred thirteen thousand, four hundred fifty".