138578307511 has 8 divisors (see below), whose sum is σ = 158423039264. Its totient is φ = 118745533440.

The previous prime is 138578307493. The next prime is 138578307523. The reversal of 138578307511 is 115703875831.

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

It is a cyclic number.

It is not a de Polignac number, because 138578307511 - 2¹⁷ = 138578176439 is a prime.

It is a super-2 number, since 2×138578307511² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138578307611) 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, 2964570 + ... + 3010951.

It is an arithmetic number, because the mean of its divisors is an integer number (19802879908).

Almost surely, 2^138578307511 is an apocalyptic number.

138578307511 is a deficient number, since it is larger than the sum of its proper divisors (19844731753).

138578307511 is an equidigital number, since it uses as much as digits as its factorization.

138578307511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5978841.

The product of its (nonzero) digits is 705600, while the sum is 49.

The spelling of 138578307511 in words is "one hundred thirty-eight billion, five hundred seventy-eight million, three hundred seven thousand, five hundred eleven".