25349561512 has 96 divisors (see below), whose sum is σ = 54885945600. Its totient is φ = 10883808000.

The previous prime is 25349561473. The next prime is 25349561537. The reversal of 25349561512 is 21516594352.

It is a super-2 number, since 2×25349561512² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12992137 + ... + 12994087.

It is an arithmetic number, because the mean of its divisors is an integer number (571728600).

Almost surely, 2^25349561512 is an apocalyptic number.

25349561512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25349561512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27442972800).

25349561512 is an abundant number, since it is smaller than the sum of its proper divisors (29536384088).

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

25349561512 is a wasteful number, since it uses less digits than its factorization.

25349561512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2415 (or 2392 counting only the distinct ones).

The product of its digits is 324000, while the sum is 43.

The spelling of 25349561512 in words is "twenty-five billion, three hundred forty-nine million, five hundred sixty-one thousand, five hundred twelve".