13747140781 has 32 divisors (see below), whose sum is σ = 15434661888. Its totient is φ = 12139424640.

The previous prime is 13747140767. The next prime is 13747140791. The reversal of 13747140781 is 18704174731.

It is a cyclic number.

It is not a de Polignac number, because 13747140781 - 2¹³ = 13747132589 is a prime.

It is a super-2 number, since 2×13747140781² (a number of 21 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 (13747140791) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16622490 + ... + 16623316.

It is an arithmetic number, because the mean of its divisors is an integer number (482333184).

Almost surely, 2^13747140781 is an apocalyptic number.

13747140781 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13747140781 is a deficient number, since it is larger than the sum of its proper divisors (1687521107).

13747140781 is a wasteful number, since it uses less digits than its factorization.

13747140781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201.

The product of its (nonzero) digits is 131712, while the sum is 43.

The spelling of 13747140781 in words is "thirteen billion, seven hundred forty-seven million, one hundred forty thousand, seven hundred eighty-one".