61823545 has 12 divisors (see below), whose sum is σ = 86300964. Its totient is φ = 42393120.

The previous prime is 61823533. The next prime is 61823569. The reversal of 61823545 is 54532816.

It can be written as a sum of positive squares in 2 ways, for example, as 23532201 + 38291344 = 4851^2 + 6188^2 .

It is not a de Polignac number, because 61823545 - 2¹⁹ = 61299257 is a prime.

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 61823545.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 125926 + ... + 126415.

It is an arithmetic number, because the mean of its divisors is an integer number (7191747).

Almost surely, 2^61823545 is an apocalyptic number.

It is an amenable number.

61823545 is a deficient number, since it is larger than the sum of its proper divisors (24477419).

61823545 is a wasteful number, since it uses less digits than its factorization.

61823545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252360 (or 252353 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

The square root of 61823545 is about 7862.7949865172. The cubic root of 61823545 is about 395.4133258262.

The spelling of 61823545 in words is "sixty-one million, eight hundred twenty-three thousand, five hundred forty-five".