1764426052489 has 3 divisors (see below), whose sum is σ = 1764427380807. Its totient is φ = 1764424724172.

The previous prime is 1764426052471. The next prime is 1764426052523. The reversal of 1764426052489 is 9842506244671.

The square root of 1764426052489 is 1328317.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 223620223225 + 1540805829264 = 472885^2 + 1241292^2 .

It is not a de Polignac number, because 1764426052489 - 2⁹ = 1764426051977 is a prime.

It is a super-2 number, since 2×1764426052489² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1764426050489) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 664159 + ... + 1992475.

It is an arithmetic number, because the mean of its divisors is an integer number (588142460269).

Almost surely, 2^{1764426052489} is an apocalyptic number.

1764426052489 is the 1328317-th square number.

1764426052489 is the 664159-th centered octagonal number.

It is an amenable number.

1764426052489 is a deficient number, since it is larger than the sum of its proper divisors (1328318).

1764426052489 is an frugal number, since it uses more digits than its factorization.

1764426052489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2656634 (or 1328317 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 58.

The spelling of 1764426052489 in words is "one trillion, seven hundred sixty-four billion, four hundred twenty-six million, fifty-two thousand, four hundred eighty-nine".