618945454 has 4 divisors (see below), whose sum is σ = 928418184. Its totient is φ = 309472726.

The previous prime is 618945449. The next prime is 618945497. The reversal of 618945454 is 454549816.

It is a happy number.

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

It is a super-2 number, since 2×618945454² = 766186950054532232, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

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, 154736362 + ... + 154736365.

It is an arithmetic number, because the mean of its divisors is an integer number (232104546).

Almost surely, 2^618945454 is an apocalyptic number.

618945454 is a deficient number, since it is larger than the sum of its proper divisors (309472730).

618945454 is a wasteful number, since it uses less digits than its factorization.

618945454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309472729.

The product of its digits is 691200, while the sum is 46.

The square root of 618945454 is about 24878.6143906770. The cubic root of 618945454 is about 852.2181759214.

The spelling of 618945454 in words is "six hundred eighteen million, nine hundred forty-five thousand, four hundred fifty-four".