451643506343261 has 8 divisors (see below), whose sum is σ = 455416619750400. Its totient is φ = 447873781457088.

The previous prime is 451643506343219. The next prime is 451643506343269. The reversal of 451643506343261 is 162343605346154.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 451643506343261 - 2²⁶ = 451643439234397 is a prime.

It is a super-2 number, since 2×451643506343261² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451643506343269) 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, 846862556 + ... + 847395701.

It is an arithmetic number, because the mean of its divisors is an integer number (56927077468800).

Almost surely, 2^{451643506343261} is an apocalyptic number.

It is an amenable number.

451643506343261 is a deficient number, since it is larger than the sum of its proper divisors (3773113407139).

451643506343261 is a wasteful number, since it uses less digits than its factorization.

451643506343261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1694260483.

The product of its (nonzero) digits is 18662400, while the sum is 53.

The spelling of 451643506343261 in words is "four hundred fifty-one trillion, six hundred forty-three billion, five hundred six million, three hundred forty-three thousand, two hundred sixty-one".