1261786357341 has 12 divisors (see below), whose sum is σ = 1839613756032. Its totient is φ = 833329307016.

The previous prime is 1261786357319. The next prime is 1261786357367. The reversal of 1261786357341 is 1437536871621.

1261786357341 is a `hidden beast` number, since 1 + 2 + 6 + 1 + 7 + 8 + 63 + 573 + 4 + 1 = 666.

It is not a de Polignac number, because 1261786357341 - 2⁵ = 1261786357309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261786357141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 655132141 + ... + 655134066.

It is an arithmetic number, because the mean of its divisors is an integer number (153301146336).

Almost surely, 2^{1261786357341} is an apocalyptic number.

It is an amenable number.

1261786357341 is a deficient number, since it is larger than the sum of its proper divisors (577827398691).

1261786357341 is a wasteful number, since it uses less digits than its factorization.

1261786357341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310266320 (or 1310266317 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 54.

The spelling of 1261786357341 in words is "one trillion, two hundred sixty-one billion, seven hundred eighty-six million, three hundred fifty-seven thousand, three hundred forty-one".