451605215667 has 4 divisors (see below), whose sum is σ = 602140287560. Its totient is φ = 301070143776.

The previous prime is 451605215639. The next prime is 451605215687. The reversal of 451605215667 is 766512506154.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 451605215667 - 2¹² = 451605211571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (451605215617) 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, 75267535942 + ... + 75267535947.

It is an arithmetic number, because the mean of its divisors is an integer number (150535071890).

Almost surely, 2^451605215667 is an apocalyptic number.

451605215667 is a deficient number, since it is larger than the sum of its proper divisors (150535071893).

451605215667 is a wasteful number, since it uses less digits than its factorization.

451605215667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150535071892.

The product of its (nonzero) digits is 1512000, while the sum is 48.

The spelling of 451605215667 in words is "four hundred fifty-one billion, six hundred five million, two hundred fifteen thousand, six hundred sixty-seven".