25016161261 has 8 divisors (see below), whose sum is σ = 30789121664. Its totient is φ = 19793006640.

The previous prime is 25016161243. The next prime is 25016161271. The reversal of 25016161261 is 16216161052.

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

It is a cyclic number.

It is not a de Polignac number, because 25016161261 - 2⁷ = 25016161133 is a prime.

It is a super-2 number, since 2×25016161261² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25016161201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137451345 + ... + 137451526.

It is an arithmetic number, because the mean of its divisors is an integer number (3848640208).

Almost surely, 2^25016161261 is an apocalyptic number.

It is an amenable number.

25016161261 is a deficient number, since it is larger than the sum of its proper divisors (5772960403).

25016161261 is a wasteful number, since it uses less digits than its factorization.

25016161261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274902891.

The product of its (nonzero) digits is 4320, while the sum is 31.

The spelling of 25016161261 in words is "twenty-five billion, sixteen million, one hundred sixty-one thousand, two hundred sixty-one".