25612021351 has 4 divisors (see below), whose sum is σ = 29270881552. Its totient is φ = 21953161152.

The previous prime is 25612021343. The next prime is 25612021361. The reversal of 25612021351 is 15312021652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25612021351 - 2³ = 25612021343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25612021301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1829430090 + ... + 1829430103.

It is an arithmetic number, because the mean of its divisors is an integer number (7317720388).

Almost surely, 2^25612021351 is an apocalyptic number.

25612021351 is a deficient number, since it is larger than the sum of its proper divisors (3658860201).

25612021351 is an equidigital number, since it uses as much as digits as its factorization.

25612021351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3658860200.

The product of its (nonzero) digits is 3600, while the sum is 28.

The spelling of 25612021351 in words is "twenty-five billion, six hundred twelve million, twenty-one thousand, three hundred fifty-one".