138601400526 has 48 divisors (see below), whose sum is σ = 324651958800. Its totient is φ = 42585917184.

The previous prime is 138601400521. The next prime is 138601400533. The reversal of 138601400526 is 625004106831.

It is a happy number.

138601400526 is a `hidden beast` number, since 1 + 3 + 8 + 601 + 40 + 0 + 5 + 2 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138601400521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5463931 + ... + 5489238.

It is an arithmetic number, because the mean of its divisors is an integer number (6763582475).

Almost surely, 2^138601400526 is an apocalyptic number.

138601400526 is an abundant number, since it is smaller than the sum of its proper divisors (186050558274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138601400526 is a wasteful number, since it uses less digits than its factorization.

138601400526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10953233 (or 10953230 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 138601400526 in words is "one hundred thirty-eight billion, six hundred one million, four hundred thousand, five hundred twenty-six".