545121556 has 12 divisors (see below), whose sum is σ = 1090243168. Its totient is φ = 233623512.

The previous prime is 545121547. The next prime is 545121569. The reversal of 545121556 is 655121545.

545121556 is an admirable number.

It is a super-2 number, since 2×545121556² = 594315021631722272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9734286 + ... + 9734341.

Almost surely, 2^545121556 is an apocalyptic number.

It is an amenable number.

545121556 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

545121556 is a wasteful number, since it uses less digits than its factorization.

545121556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19468638 (or 19468636 counting only the distinct ones).

The product of its digits is 30000, while the sum is 34.

The square root of 545121556 is about 23347.8383581864. The cubic root of 545121556 is about 816.8916407723.

The spelling of 545121556 in words is "five hundred forty-five million, one hundred twenty-one thousand, five hundred fifty-six".