25045320021551 has 4 divisors (see below), whose sum is σ = 25722220562712. Its totient is φ = 24368419480392.

The previous prime is 25045320021517. The next prime is 25045320021593. The reversal of 25045320021551 is 15512002354052.

It is a happy number.

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 25045320021551 - 2¹⁰ = 25045320020527 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 (25045320021151) 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, 338450270525 + ... + 338450270598.

It is an arithmetic number, because the mean of its divisors is an integer number (6430555140678).

Almost surely, 2^{25045320021551} is an apocalyptic number.

25045320021551 is a deficient number, since it is larger than the sum of its proper divisors (676900541161).

25045320021551 is an equidigital number, since it uses as much as digits as its factorization.

25045320021551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676900541160.

The product of its (nonzero) digits is 60000, while the sum is 35.

The spelling of 25045320021551 in words is "twenty-five trillion, forty-five billion, three hundred twenty million, twenty-one thousand, five hundred fifty-one".