1261693937237 has 12 divisors (see below), whose sum is σ = 1313972172288. Its totient is φ = 1211379888600.

The previous prime is 1261693937221. The next prime is 1261693937347. The reversal of 1261693937237 is 7327393961621.

It is not a de Polignac number, because 1261693937237 - 2⁴ = 1261693937221 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 (1261693931237) 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 11 ways as a sum of consecutive naturals, for example, 5046839 + ... + 5290932.

It is an arithmetic number, because the mean of its divisors is an integer number (109497681024).

Almost surely, 2^{1261693937237} is an apocalyptic number.

It is an amenable number.

1261693937237 is a deficient number, since it is larger than the sum of its proper divisors (52278235051).

1261693937237 is a wasteful number, since it uses less digits than its factorization.

1261693937237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10337960 (or 10337929 counting only the distinct ones).

The product of its digits is 15431472, while the sum is 59.

The spelling of 1261693937237 in words is "one trillion, two hundred sixty-one billion, six hundred ninety-three million, nine hundred thirty-seven thousand, two hundred thirty-seven".