261657100050412 has 48 divisors (see below), whose sum is σ = 530718544127520. Its totient is φ = 111730219776000.

The previous prime is 261657100050407. The next prime is 261657100050419. The reversal of 261657100050412 is 214050001756162.

It is not an unprimeable number, because it can be changed into a prime (261657100050419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2771039589 + ... + 2771134012.

It is an arithmetic number, because the mean of its divisors is an integer number (11056636335990).

Almost surely, 2^{261657100050412} is an apocalyptic number.

261657100050412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

261657100050412 is an abundant number, since it is smaller than the sum of its proper divisors (269061444077108).

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

261657100050412 is a wasteful number, since it uses less digits than its factorization.

261657100050412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5542173682 (or 5542173680 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 261657100050412 in words is "two hundred sixty-one trillion, six hundred fifty-seven billion, one hundred million, fifty thousand, four hundred twelve".