745584122978 has 6 divisors (see below), whose sum is σ = 1118378016171. Its totient is φ = 372791450922.

The previous prime is 745584122963. The next prime is 745584123017. The reversal of 745584122978 is 879221485547.

It can be written as a sum of positive squares in only one way, i.e., 372792061489 + 372792061489 = 610567^2 + 610567^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=610567.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 745584122978.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 915851 + ... + 1526417.

Almost surely, 2^745584122978 is an apocalyptic number.

745584122978 is a deficient number, since it is larger than the sum of its proper divisors (372793893193).

745584122978 is an frugal number, since it uses more digits than its factorization.

745584122978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1221136 (or 610569 counting only the distinct ones).

The product of its digits is 45158400, while the sum is 62.

The spelling of 745584122978 in words is "seven hundred forty-five billion, five hundred eighty-four million, one hundred twenty-two thousand, nine hundred seventy-eight".