138268061787 has 8 divisors (see below), whose sum is σ = 184365474304. Its totient is φ = 92174678568.

The previous prime is 138268061777. The next prime is 138268061797. The reversal of 138268061787 is 787160862831.

It is an interprime number because it is at equal distance from previous prime (138268061777) and next prime (138268061797).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138268061787 - 2¹⁴ = 138268045403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138268061707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 926323 + ... + 1065180.

It is an arithmetic number, because the mean of its divisors is an integer number (23045684288).

Almost surely, 2^138268061787 is an apocalyptic number.

138268061787 is a deficient number, since it is larger than the sum of its proper divisors (46097412517).

138268061787 is a wasteful number, since it uses less digits than its factorization.

138268061787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2014649.

The product of its (nonzero) digits is 5419008, while the sum is 57.

The spelling of 138268061787 in words is "one hundred thirty-eight billion, two hundred sixty-eight million, sixty-one thousand, seven hundred eighty-seven".