25042949051 has 4 divisors (see below), whose sum is σ = 25044168912. Its totient is φ = 25041729192.

The previous prime is 25042949047. The next prime is 25042949059. The reversal of 25042949051 is 15094924052.

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

It is a cyclic number.

It is not a de Polignac number, because 25042949051 - 2² = 25042949047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25042949059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 578600 + ... + 620373.

It is an arithmetic number, because the mean of its divisors is an integer number (6261042228).

Almost surely, 2^25042949051 is an apocalyptic number.

25042949051 is a deficient number, since it is larger than the sum of its proper divisors (1219861).

25042949051 is a wasteful number, since it uses less digits than its factorization.

25042949051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1219860.

The product of its (nonzero) digits is 129600, while the sum is 41.

The spelling of 25042949051 in words is "twenty-five billion, forty-two million, nine hundred forty-nine thousand, fifty-one".