25695213856 has 48 divisors (see below), whose sum is σ = 57683445624. Its totient is φ = 11161718784.

The previous prime is 25695213833. The next prime is 25695213871. The reversal of 25695213856 is 65831259652.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12206714256 + 13488499600 = 110484^2 + 116140^2 .

It is a super-3 number, since 3×25695213856³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1809615 + ... + 1823758.

Almost surely, 2^25695213856 is an apocalyptic number.

25695213856 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

25695213856 is an abundant number, since it is smaller than the sum of its proper divisors (31988231768).

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

25695213856 is a wasteful number, since it uses less digits than its factorization.

25695213856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3633413 (or 3633405 counting only the distinct ones).

The product of its digits is 3888000, while the sum is 52.

The spelling of 25695213856 in words is "twenty-five billion, six hundred ninety-five million, two hundred thirteen thousand, eight hundred fifty-six".