451681440556 has 12 divisors (see below), whose sum is σ = 790657867440. Its totient is φ = 225779192720.

The previous prime is 451681440533. The next prime is 451681440559. The reversal of 451681440556 is 655044186154.

It is a super-2 number, since 2×451681440556² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (451681440559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15365371 + ... + 15394738.

It is an arithmetic number, because the mean of its divisors is an integer number (65888155620).

Almost surely, 2^451681440556 is an apocalyptic number.

It is an amenable number.

451681440556 is a deficient number, since it is larger than the sum of its proper divisors (338976426884).

451681440556 is a wasteful number, since it uses less digits than its factorization.

451681440556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30763784 (or 30763782 counting only the distinct ones).

The product of its (nonzero) digits is 2304000, while the sum is 49.

The spelling of 451681440556 in words is "four hundred fifty-one billion, six hundred eighty-one million, four hundred forty thousand, five hundred fifty-six".