451603621545642 has 32 divisors (see below), whose sum is σ = 1003772723328000. Its totient is φ = 150503172531264.

The previous prime is 451603621545619. The next prime is 451603621545689. The reversal of 451603621545642 is 246545126306154.

451603621545642 is a `hidden beast` number, since 4 + 5 + 1 + 6 + 0 + 3 + 6 + 21 + 54 + 564 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 871071343 + ... + 871589634.

It is an arithmetic number, because the mean of its divisors is an integer number (31367897604000).

Almost surely, 2^{451603621545642} is an apocalyptic number.

451603621545642 is an abundant number, since it is smaller than the sum of its proper divisors (552169101782358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

451603621545642 is a wasteful number, since it uses less digits than its factorization.

451603621545642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1742665787 (or 1742665781 counting only the distinct ones).

The product of its (nonzero) digits is 20736000, while the sum is 54.

The spelling of 451603621545642 in words is "four hundred fifty-one trillion, six hundred three billion, six hundred twenty-one million, five hundred forty-five thousand, six hundred forty-two".