451512770809 has 3 divisors (see below), whose sum is σ = 451513442757. Its totient is φ = 451512098862.

The previous prime is 451512770749. The next prime is 451512770843. The reversal of 451512770809 is 908077215154.

The square root of 451512770809 is 671947.

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 is not a de Polignac number, because 451512770809 - 2⁹ = 451512770297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (451512770879) 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, 335974 + ... + 1007920.

It is an arithmetic number, because the mean of its divisors is an integer number (150504480919).

Almost surely, 2^451512770809 is an apocalyptic number.

451512770809 is the 671947-th square number.

451512770809 is the 335974-th centered octagonal number.

It is an amenable number.

451512770809 is a deficient number, since it is larger than the sum of its proper divisors (671948).

451512770809 is an frugal number, since it uses more digits than its factorization.

451512770809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1343894 (or 671947 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 49.

Multiplying 451512770809 by its sum of digits (49), we get a square (22124125769641 = 4703629²).

The spelling of 451512770809 in words is "four hundred fifty-one billion, five hundred twelve million, seven hundred seventy thousand, eight hundred nine".