13730307281781 has 16 divisors (see below), whose sum is σ = 18319656915456. Its totient is φ = 9147249221616.

The previous prime is 13730307281777. The next prime is 13730307281783. The reversal of 13730307281781 is 18718270303731.

It is not a de Polignac number, because 13730307281781 - 2² = 13730307281777 is a prime.

It is a super-2 number, since 2×13730307281781² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13730307281783) 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, 43291926 + ... + 43607928.

It is an arithmetic number, because the mean of its divisors is an integer number (1144978557216).

Almost surely, 2^{13730307281781} is an apocalyptic number.

It is an amenable number.

13730307281781 is a deficient number, since it is larger than the sum of its proper divisors (4589349633675).

13730307281781 is a wasteful number, since it uses less digits than its factorization.

13730307281781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325912.

The product of its (nonzero) digits is 1185408, while the sum is 51.

The spelling of 13730307281781 in words is "thirteen trillion, seven hundred thirty billion, three hundred seven million, two hundred eighty-one thousand, seven hundred eighty-one".