25561346154 has 32 divisors (see below), whose sum is σ = 51487169280. Its totient is φ = 8459785152.

The previous prime is 25561346137. The next prime is 25561346159. The reversal of 25561346154 is 45164316552.

It is a super-2 number, since 2×25561346154² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25561346159) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1330932 + ... + 1350000.

It is an arithmetic number, because the mean of its divisors is an integer number (1608974040).

Almost surely, 2^25561346154 is an apocalyptic number.

25561346154 is an abundant number, since it is smaller than the sum of its proper divisors (25925823126).

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

25561346154 is a wasteful number, since it uses less digits than its factorization.

25561346154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20654.

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

The spelling of 25561346154 in words is "twenty-five billion, five hundred sixty-one million, three hundred forty-six thousand, one hundred fifty-four".