138475630749 has 16 divisors (see below), whose sum is σ = 186708862080. Its totient is φ = 91282161600.

The previous prime is 138475630739. The next prime is 138475630841. The reversal of 138475630749 is 947036574831.

It is not a de Polignac number, because 138475630749 - 2⁵ = 138475630717 is a prime.

It is a super-2 number, since 2×138475630749² (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 (138475630739) 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, 72489 + ... + 531230.

It is an arithmetic number, because the mean of its divisors is an integer number (11669303880).

Almost surely, 2^138475630749 is an apocalyptic number.

It is an amenable number.

138475630749 is a deficient number, since it is larger than the sum of its proper divisors (48233231331).

138475630749 is a wasteful number, since it uses less digits than its factorization.

138475630749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604580.

The product of its (nonzero) digits is 15240960, while the sum is 57.

The spelling of 138475630749 in words is "one hundred thirty-eight billion, four hundred seventy-five million, six hundred thirty thousand, seven hundred forty-nine".