25220783551 has 8 divisors (see below), whose sum is σ = 26706117744. Its totient is φ = 23735644800.

The previous prime is 25220783461. The next prime is 25220783591. The reversal of 25220783551 is 15538702252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25220783551 - 2⁹ = 25220783039 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 (25220783591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280201 + ... + 359101.

It is an arithmetic number, because the mean of its divisors is an integer number (3338264718).

Almost surely, 2^25220783551 is an apocalyptic number.

25220783551 is a deficient number, since it is larger than the sum of its proper divisors (1485334193).

25220783551 is a wasteful number, since it uses less digits than its factorization.

25220783551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97721.

The product of its (nonzero) digits is 168000, while the sum is 40.

The spelling of 25220783551 in words is "twenty-five billion, two hundred twenty million, seven hundred eighty-three thousand, five hundred fifty-one".