25019219968 has 68 divisors (see below), whose sum is σ = 50205435840. Its totient is φ = 12467830784.

The previous prime is 25019219903. The next prime is 25019219977. The reversal of 25019219968 is 86991291052.

It is a super-2 number, since 2×25019219968² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31391346 + ... + 31392142.

Almost surely, 2^25019219968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25019219968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25102717920).

25019219968 is an abundant number, since it is smaller than the sum of its proper divisors (25186215872).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25019219968 is an frugal number, since it uses more digits than its factorization.

25019219968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308 (or 1278 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 52.

The spelling of 25019219968 in words is "twenty-five billion, nineteen million, two hundred nineteen thousand, nine hundred sixty-eight".