64815476458454 has 4 divisors (see below), whose sum is σ = 97223214687684. Its totient is φ = 32407738229226.

The previous prime is 64815476458441. The next prime is 64815476458463. The reversal of 64815476458454 is 45485467451846.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16203869114612 + ... + 16203869114615.

It is an arithmetic number, because the mean of its divisors is an integer number (24305803671921).

Almost surely, 2^{64815476458454} is an apocalyptic number.

64815476458454 is a deficient number, since it is larger than the sum of its proper divisors (32407738229230).

64815476458454 is a wasteful number, since it uses less digits than its factorization.

64815476458454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32407738229229.

The product of its digits is 2064384000, while the sum is 71.

The spelling of 64815476458454 in words is "sixty-four trillion, eight hundred fifteen billion, four hundred seventy-six million, four hundred fifty-eight thousand, four hundred fifty-four".