25451205345 has 32 divisors (see below), whose sum is σ = 45275303040. Its totient is φ = 13565361600.

The previous prime is 25451205341. The next prime is 25451205421. The reversal of 25451205345 is 54350215452.

25451205345 is a `hidden beast` number, since 2 + 54 + 51 + 20 + 534 + 5 = 666.

It is not a de Polignac number, because 25451205345 - 2² = 25451205341 is a prime.

It is a super-4 number, since 4×25451205345⁴ (a number of 43 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (25451205341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 156570 + ... + 274620.

It is an arithmetic number, because the mean of its divisors is an integer number (1414853220).

Almost surely, 2^25451205345 is an apocalyptic number.

It is an amenable number.

25451205345 is a deficient number, since it is larger than the sum of its proper divisors (19824097695).

25451205345 is a wasteful number, since it uses less digits than its factorization.

25451205345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119662 (or 119656 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 36.

The spelling of 25451205345 in words is "twenty-five billion, four hundred fifty-one million, two hundred five thousand, three hundred forty-five".