25140161263 has 4 divisors (see below), whose sum is σ = 28731612880. Its totient is φ = 21548709648.

The previous prime is 25140161261. The next prime is 25140161273. The reversal of 25140161263 is 36216104152.

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 25140161263 - 2¹ = 25140161261 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 (25140161261) 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, 1795725798 + ... + 1795725811.

It is an arithmetic number, because the mean of its divisors is an integer number (7182903220).

Almost surely, 2^25140161263 is an apocalyptic number.

25140161263 is a deficient number, since it is larger than the sum of its proper divisors (3591451617).

25140161263 is an equidigital number, since it uses as much as digits as its factorization.

25140161263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3591451616.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 25140161263 in words is "twenty-five billion, one hundred forty million, one hundred sixty-one thousand, two hundred sixty-three".