545677990 has 128 divisors (see below), whose sum is σ = 1233211392. Its totient is φ = 170987520.

The previous prime is 545677969. The next prime is 545677991. The reversal of 545677990 is 99776545.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545677991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1545654 + ... + 1546006.

It is an arithmetic number, because the mean of its divisors is an integer number (9634464).

Almost surely, 2^545677990 is an apocalyptic number.

545677990 is an abundant number, since it is smaller than the sum of its proper divisors (687533402).

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

545677990 is a wasteful number, since it uses less digits than its factorization.

545677990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454.

The product of its (nonzero) digits is 2381400, while the sum is 52.

The square root of 545677990 is about 23359.7514969659. The cubic root of 545677990 is about 817.1694942199.

The spelling of 545677990 in words is "five hundred forty-five million, six hundred seventy-seven thousand, nine hundred ninety".