161822427638 has 8 divisors (see below), whose sum is σ = 246356531832. Its totient is φ = 79703583696.

The previous prime is 161822427623. The next prime is 161822427667. The reversal of 161822427638 is 836724228161.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 603814895 + ... + 603815162.

It is an arithmetic number, because the mean of its divisors is an integer number (30794566479).

Almost surely, 2^161822427638 is an apocalyptic number.

161822427638 is a deficient number, since it is larger than the sum of its proper divisors (84534104194).

161822427638 is a wasteful number, since it uses less digits than its factorization.

161822427638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1207630126.

The product of its digits is 1548288, while the sum is 50.

The spelling of 161822427638 in words is "one hundred sixty-one billion, eight hundred twenty-two million, four hundred twenty-seven thousand, six hundred thirty-eight".