25196858779 has 8 divisors (see below), whose sum is σ = 25325300000. Its totient is φ = 25068578112.

The previous prime is 25196858761. The next prime is 25196858789. The reversal of 25196858779 is 97785869152.

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

It is a cyclic number.

It is not a de Polignac number, because 25196858779 - 2¹³ = 25196850587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25196858789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281047 + ... + 359695.

It is an arithmetic number, because the mean of its divisors is an integer number (3165662500).

Almost surely, 2^25196858779 is an apocalyptic number.

25196858779 is a deficient number, since it is larger than the sum of its proper divisors (128441221).

25196858779 is a wasteful number, since it uses less digits than its factorization.

25196858779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80277.

The product of its digits is 76204800, while the sum is 67.

The spelling of 25196858779 in words is "twenty-five billion, one hundred ninety-six million, eight hundred fifty-eight thousand, seven hundred seventy-nine".