1797066922638 has 32 divisors (see below), whose sum is σ = 3870721764000. Its totient is φ = 552927085056.

The previous prime is 1797066922621. The next prime is 1797066922697. The reversal of 1797066922638 is 8362296607971.

It is a super-2 number, since 2×1797066922638² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2412138 + ... + 3067986.

It is an arithmetic number, because the mean of its divisors is an integer number (120960055125).

Almost surely, 2^{1797066922638} is an apocalyptic number.

1797066922638 is an abundant number, since it is smaller than the sum of its proper divisors (2073654841362).

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

1797066922638 is a wasteful number, since it uses less digits than its factorization.

1797066922638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690996.

The product of its (nonzero) digits is 82301184, while the sum is 66.

The spelling of 1797066922638 in words is "one trillion, seven hundred ninety-seven billion, sixty-six million, nine hundred twenty-two thousand, six hundred thirty-eight".