1381251256319 has 6 divisors (see below), whose sum is σ = 1518234852120. Its totient is φ = 1255682960180.

The previous prime is 1381251256223. The next prime is 1381251256321. The reversal of 1381251256319 is 9136521521831.

It is not a de Polignac number, because 1381251256319 - 2²⁴ = 1381234479103 is a prime.

It is a super-2 number, since 2×1381251256319² (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 (1381251256339) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5707649699 + ... + 5707649940.

It is an arithmetic number, because the mean of its divisors is an integer number (253039142020).

Almost surely, 2^{1381251256319} is an apocalyptic number.

1381251256319 is a deficient number, since it is larger than the sum of its proper divisors (136983595801).

1381251256319 is a wasteful number, since it uses less digits than its factorization.

1381251256319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11415299661 (or 11415299650 counting only the distinct ones).

The product of its digits is 388800, while the sum is 47.

The spelling of 1381251256319 in words is "one trillion, three hundred eighty-one billion, two hundred fifty-one million, two hundred fifty-six thousand, three hundred nineteen".