25042781007 has 6 divisors (see below), whose sum is σ = 36172905912. Its totient is φ = 16695187332.

The previous prime is 25042780951. The next prime is 25042781021. The reversal of 25042781007 is 70018724052.

It is not a de Polignac number, because 25042781007 - 2²⁰ = 25041732431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25042781047) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1391265603 + ... + 1391265620.

It is an arithmetic number, because the mean of its divisors is an integer number (6028817652).

Almost surely, 2^25042781007 is an apocalyptic number.

25042781007 is a deficient number, since it is larger than the sum of its proper divisors (11130124905).

25042781007 is a wasteful number, since it uses less digits than its factorization.

25042781007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2782531229 (or 2782531226 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 36.

The spelling of 25042781007 in words is "twenty-five billion, forty-two million, seven hundred eighty-one thousand, seven".