25709373264 has 20 divisors (see below), whose sum is σ = 66415881056. Its totient is φ = 8569791072.

The previous prime is 25709373257. The next prime is 25709373293. The reversal of 25709373264 is 46237390752.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 535611943 = 25709373264 / (2 + 5 + 7 + 0 + 9 + 3 + 7 + 3 + 2 + 6 + 4).

It is a congruent number.

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, 267805924 + ... + 267806019.

Almost surely, 2^25709373264 is an apocalyptic number.

25709373264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25709373264 is an abundant number, since it is smaller than the sum of its proper divisors (40706507792).

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

25709373264 is a wasteful number, since it uses less digits than its factorization.

25709373264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535611954 (or 535611948 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 48.

The spelling of 25709373264 in words is "twenty-five billion, seven hundred nine million, three hundred seventy-three thousand, two hundred sixty-four".