25155361263 has 4 divisors (see below), whose sum is σ = 33540481688. Its totient is φ = 16770240840.

The previous prime is 25155361219. The next prime is 25155361289. The reversal of 25155361263 is 36216355152.

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

It is not a de Polignac number, because 25155361263 - 2¹² = 25155357167 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 (25155361213) 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, 4192560208 + ... + 4192560213.

It is an arithmetic number, because the mean of its divisors is an integer number (8385120422).

Almost surely, 2^25155361263 is an apocalyptic number.

25155361263 is a deficient number, since it is larger than the sum of its proper divisors (8385120425).

25155361263 is an equidigital number, since it uses as much as digits as its factorization.

25155361263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8385120424.

The product of its digits is 162000, while the sum is 39.

The spelling of 25155361263 in words is "twenty-five billion, one hundred fifty-five million, three hundred sixty-one thousand, two hundred sixty-three".