138402526945 has 8 divisors (see below), whose sum is σ = 167000619240. Its totient is φ = 110110296960.

The previous prime is 138402526939. The next prime is 138402526957. The reversal of 138402526945 is 549625204831.

It can be written as a sum of positive squares in 4 ways, for example, as 898021089 + 137504505856 = 29967^2 + 370816^2 .

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

It is not a de Polignac number, because 138402526945 - 2¹³ = 138402518753 is a prime.

It is a super-2 number, since 2×138402526945² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76464580 + ... + 76466389.

It is an arithmetic number, because the mean of its divisors is an integer number (20875077405).

Almost surely, 2^138402526945 is an apocalyptic number.

It is an amenable number.

138402526945 is a deficient number, since it is larger than the sum of its proper divisors (28598092295).

138402526945 is a wasteful number, since it uses less digits than its factorization.

138402526945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152931155.

The product of its (nonzero) digits is 2073600, while the sum is 49.

The spelling of 138402526945 in words is "one hundred thirty-eight billion, four hundred two million, five hundred twenty-six thousand, nine hundred forty-five".