25198441499 has 32 divisors (see below), whose sum is σ = 32806563840. Its totient is φ = 18767469600.

The previous prime is 25198441451. The next prime is 25198441553. The reversal of 25198441499 is 99414489152.

It is a happy number.

It is not a de Polignac number, because 25198441499 - 2¹² = 25198437403 is a prime.

It is a super-2 number, since 2×25198441499² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25198441399) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2791904 + ... + 2800914.

It is an arithmetic number, because the mean of its divisors is an integer number (1025205120).

Almost surely, 2^25198441499 is an apocalyptic number.

25198441499 is a deficient number, since it is larger than the sum of its proper divisors (7608122341).

25198441499 is a wasteful number, since it uses less digits than its factorization.

25198441499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10631.

The product of its digits is 3732480, while the sum is 56.

The spelling of 25198441499 in words is "twenty-five billion, one hundred ninety-eight million, four hundred forty-one thousand, four hundred ninety-nine".