25477730045 has 4 divisors (see below), whose sum is σ = 30573276060. Its totient is φ = 20382184032.

The previous prime is 25477730023. The next prime is 25477730077. The reversal of 25477730045 is 54003777452.

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

It can be written as a sum of positive squares in 2 ways, for example, as 12381903076 + 13095826969 = 111274^2 + 114437^2 .

It is a cyclic number.

It is not a de Polignac number, because 25477730045 - 2¹⁸ = 25477467901 is a prime.

It is a super-2 number, since 2×25477730045² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25477729978 and 25477730005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2547773000 + ... + 2547773009.

It is an arithmetic number, because the mean of its divisors is an integer number (7643319015).

Almost surely, 2^25477730045 is an apocalyptic number.

It is an amenable number.

25477730045 is a deficient number, since it is larger than the sum of its proper divisors (5095546015).

25477730045 is an equidigital number, since it uses as much as digits as its factorization.

25477730045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5095546014.

The product of its (nonzero) digits is 823200, while the sum is 44.

The spelling of 25477730045 in words is "twenty-five billion, four hundred seventy-seven million, seven hundred thirty thousand, forty-five".