638502183850141 has 16 divisors (see below), whose sum is σ = 689155551221760. Its totient is φ = 588069974638080.

The previous prime is 638502183850073. The next prime is 638502183850147. The reversal of 638502183850141 is 141058381205836.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 638502183850141 - 2⁴¹ = 636303160594589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638502183850147) 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, 20208645 + ... + 41053546.

It is an arithmetic number, because the mean of its divisors is an integer number (43072221951360).

Almost surely, 2^{638502183850141} is an apocalyptic number.

It is an amenable number.

638502183850141 is a deficient number, since it is larger than the sum of its proper divisors (50653367371619).

638502183850141 is a wasteful number, since it uses less digits than its factorization.

638502183850141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61263996.

The product of its (nonzero) digits is 5529600, while the sum is 55.

The spelling of 638502183850141 in words is "six hundred thirty-eight trillion, five hundred two billion, one hundred eighty-three million, eight hundred fifty thousand, one hundred forty-one".