261148668261846 has 8 divisors (see below), whose sum is σ = 522297336523704. Its totient is φ = 87049556087280.

The previous prime is 261148668261841. The next prime is 261148668261851. The reversal of 261148668261846 is 648162866841162.

It is an interprime number because it is at equal distance from previous prime (261148668261841) and next prime (261148668261851).

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

261148668261846 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261148668261841) 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, 21762389021815 + ... + 21762389021826.

It is an arithmetic number, because the mean of its divisors is an integer number (65287167065463).

Almost surely, 2^{261148668261846} is an apocalyptic number.

261148668261846 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261148668261846 is a wasteful number, since it uses less digits than its factorization.

261148668261846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43524778043646.

The product of its digits is 254803968, while the sum is 69.

The spelling of 261148668261846 in words is "two hundred sixty-one trillion, one hundred forty-eight billion, six hundred sixty-eight million, two hundred sixty-one thousand, eight hundred forty-six".