25494135450 has 96 divisors (see below), whose sum is σ = 72309419520. Its totient is φ = 5823057600.

The previous prime is 25494135449. The next prime is 25494135461. The reversal of 25494135450 is 5453149452.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1599621 + ... + 1615479.

It is an arithmetic number, because the mean of its divisors is an integer number (753223120).

Almost surely, 2^25494135450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25494135450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36154709760).

25494135450 is an abundant number, since it is smaller than the sum of its proper divisors (46815284070).

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

25494135450 is a wasteful number, since it uses less digits than its factorization.

25494135450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17412 (or 17407 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 25494135450 in words is "twenty-five billion, four hundred ninety-four million, one hundred thirty-five thousand, four hundred fifty".