451402340021 has 16 divisors (see below), whose sum is σ = 467743723200. Its totient is φ = 435386976000.

The previous prime is 451402339981. The next prime is 451402340063. The reversal of 451402340021 is 120043204154.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-451402340021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451402348021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1286810 + ... + 1599588.

It is an arithmetic number, because the mean of its divisors is an integer number (29233982700).

Almost surely, 2^451402340021 is an apocalyptic number.

It is an amenable number.

451402340021 is a deficient number, since it is larger than the sum of its proper divisors (16341383179).

451402340021 is a wasteful number, since it uses less digits than its factorization.

451402340021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313300.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 451402340021 its reverse (120043204154), we get a palindrome (571445544175).

The spelling of 451402340021 in words is "four hundred fifty-one billion, four hundred two million, three hundred forty thousand, twenty-one".