545621076 has 384 divisors, whose sum is σ = 1956864000. Its totient is φ = 129548160.

The previous prime is 545621033. The next prime is 545621077. The reversal of 545621076 is 670126545.

It is a happy number.

545621076 is a `hidden beast` number, since 545 + 6 + 2 + 107 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 545621076.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545621077) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5297241 + ... + 5297343.

It is an arithmetic number, because the mean of its divisors is an integer number (5096000).

Almost surely, 2^545621076 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 545621076, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (978432000).

545621076 is an abundant number, since it is smaller than the sum of its proper divisors (1411242924).

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

545621076 is a wasteful number, since it uses less digits than its factorization.

545621076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 545621076 is about 23358.5332587472. The cubic root of 545621076 is about 817.1410830797.

The spelling of 545621076 in words is "five hundred forty-five million, six hundred twenty-one thousand, seventy-six".