25178494097 has 16 divisors (see below), whose sum is σ = 26343702528. Its totient is φ = 24037169040.

The previous prime is 25178494091. The next prime is 25178494141. The reversal of 25178494097 is 79049487152.

It is a happy number.

It is not a de Polignac number, because 25178494097 - 2¹⁴ = 25178477713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25178494091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 824768 + ... + 854750.

It is an arithmetic number, because the mean of its divisors is an integer number (1646481408).

Almost surely, 2^25178494097 is an apocalyptic number.

It is an amenable number.

25178494097 is a deficient number, since it is larger than the sum of its proper divisors (1165208431).

25178494097 is a wasteful number, since it uses less digits than its factorization.

25178494097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30380.

The product of its (nonzero) digits is 5080320, while the sum is 56.

The spelling of 25178494097 in words is "twenty-five billion, one hundred seventy-eight million, four hundred ninety-four thousand, ninety-seven".