25454215154 has 4 divisors (see below), whose sum is σ = 38181322734. Its totient is φ = 12727107576.

The previous prime is 25454215151. The next prime is 25454215177. The reversal of 25454215154 is 45151245452.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 25451416225 + 2798929 = 159535^2 + 1673^2 .

It is a super-2 number, since 2×25454215154² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25454215151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6363553787 + ... + 6363553790.

Almost surely, 2^25454215154 is an apocalyptic number.

25454215154 is a deficient number, since it is larger than the sum of its proper divisors (12727107580).

25454215154 is a wasteful number, since it uses less digits than its factorization.

25454215154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12727107579.

The product of its digits is 160000, while the sum is 38.

The spelling of 25454215154 in words is "twenty-five billion, four hundred fifty-four million, two hundred fifteen thousand, one hundred fifty-four".