138767455037881 has 32 divisors (see below), whose sum is σ = 144762405350400. Its totient is φ = 132875529373440.

The previous prime is 138767455037863. The next prime is 138767455037947. The reversal of 138767455037881 is 188730554767831.

It is a cyclic number.

It is not a de Polignac number, because 138767455037881 - 2¹³ = 138767455029689 is a prime.

It is a super-2 number, since 2×138767455037881² (a number of 29 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (73) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138767455037681) 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, 1720167615 + ... + 1720248283.

It is an arithmetic number, because the mean of its divisors is an integer number (4523825167200).

Almost surely, 2^{138767455037881} is an apocalyptic number.

It is an amenable number.

138767455037881 is a deficient number, since it is larger than the sum of its proper divisors (5994950312519).

138767455037881 is a wasteful number, since it uses less digits than its factorization.

138767455037881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82369.

The product of its (nonzero) digits is 948326400, while the sum is 73.

The spelling of 138767455037881 in words is "one hundred thirty-eight trillion, seven hundred sixty-seven billion, four hundred fifty-five million, thirty-seven thousand, eight hundred eighty-one".