1381766338231 has 4 divisors (see below), whose sum is σ = 1382838307200. Its totient is φ = 1380694369264.

The previous prime is 1381766338171. The next prime is 1381766338237. The reversal of 1381766338231 is 1328336671831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1381766338231 - 2³⁷ = 1244327384759 is a prime.

It is a super-2 number, since 2×1381766338231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381766338237) 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, 535982551 + ... + 535985128.

It is an arithmetic number, because the mean of its divisors is an integer number (345709576800).

Almost surely, 2^{1381766338231} is an apocalyptic number.

1381766338231 is a deficient number, since it is larger than the sum of its proper divisors (1071968969).

1381766338231 is a wasteful number, since it uses less digits than its factorization.

1381766338231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071968968.

The product of its digits is 2612736, while the sum is 52.

The spelling of 1381766338231 in words is "one trillion, three hundred eighty-one billion, seven hundred sixty-six million, three hundred thirty-eight thousand, two hundred thirty-one".