25305145454 has 4 divisors (see below), whose sum is σ = 37957718184. Its totient is φ = 12652572726.

The previous prime is 25305145423. The next prime is 25305145477. The reversal of 25305145454 is 45454150352.

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

It is a super-2 number, since 2×25305145454² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6326286362 + ... + 6326286365.

It is an arithmetic number, because the mean of its divisors is an integer number (9489429546).

Almost surely, 2^25305145454 is an apocalyptic number.

25305145454 is a deficient number, since it is larger than the sum of its proper divisors (12652572730).

25305145454 is a wasteful number, since it uses less digits than its factorization.

25305145454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12652572729.

The product of its (nonzero) digits is 240000, while the sum is 38.

The spelling of 25305145454 in words is "twenty-five billion, three hundred five million, one hundred forty-five thousand, four hundred fifty-four".