25479407794 has 8 divisors (see below), whose sum is σ = 38223323820. Its totient is φ = 12738299856.

The previous prime is 25479407671. The next prime is 25479407881. The reversal of 25479407794 is 49770497452.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20023665025 + 5455742769 = 141505^2 + 73863^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 679189 + ... + 715720.

Almost surely, 2^25479407794 is an apocalyptic number.

25479407794 is a deficient number, since it is larger than the sum of its proper divisors (12743916026).

25479407794 is a wasteful number, since it uses less digits than its factorization.

25479407794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404044.

The product of its (nonzero) digits is 17781120, while the sum is 58.

The spelling of 25479407794 in words is "twenty-five billion, four hundred seventy-nine million, four hundred seven thousand, seven hundred ninety-four".