1664633774031 has 8 divisors (see below), whose sum is σ = 2266735352064. Its totient is φ = 1086144022680.

The previous prime is 1664633774021. The next prime is 1664633774087. The reversal of 1664633774031 is 1304773364661.

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

It is not a de Polignac number, because 1664633774031 - 2³⁷ = 1527194820559 is a prime.

It is a super-2 number, since 2×1664633774031² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664633774021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5902956505 + ... + 5902956786.

It is an arithmetic number, because the mean of its divisors is an integer number (283341919008).

Almost surely, 2^{1664633774031} is an apocalyptic number.

1664633774031 is a deficient number, since it is larger than the sum of its proper divisors (602101578033).

1664633774031 is a wasteful number, since it uses less digits than its factorization.

1664633774031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11805913341.

The product of its (nonzero) digits is 4572288, while the sum is 51.

The spelling of 1664633774031 in words is "one trillion, six hundred sixty-four billion, six hundred thirty-three million, seven hundred seventy-four thousand, thirty-one".