1601227600638 has 32 divisors (see below), whose sum is σ = 3275423944704. Its totient is φ = 521614627872.

The previous prime is 1601227600633. The next prime is 1601227600699. The reversal of 1601227600638 is 8360067221061.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1601227600638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601227600633) 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, 4002670 + ... + 4384497.

It is an arithmetic number, because the mean of its divisors is an integer number (102356998272).

Almost surely, 2^{1601227600638} is an apocalyptic number.

1601227600638 is an abundant number, since it is smaller than the sum of its proper divisors (1674196344066).

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

1601227600638 is a wasteful number, since it uses less digits than its factorization.

1601227600638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8387896.

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 1601227600638 in words is "one trillion, six hundred one billion, two hundred twenty-seven million, six hundred thousand, six hundred thirty-eight".