61133545 has 24 divisors (see below), whose sum is σ = 84490560. Its totient is φ = 42107040.

The previous prime is 61133533. The next prime is 61133551. The reversal of 61133545 is 54533116.

It is not a de Polignac number, because 61133545 - 2¹⁵ = 61100777 is a prime.

It is a plaindrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18316 + ... + 21394.

It is an arithmetic number, because the mean of its divisors is an integer number (3520440).

Almost surely, 2^61133545 is an apocalyptic number.

It is an amenable number.

61133545 is a deficient number, since it is larger than the sum of its proper divisors (23357015).

61133545 is a wasteful number, since it uses less digits than its factorization.

61133545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3133 (or 3114 counting only the distinct ones).

The product of its digits is 5400, while the sum is 28.

The square root of 61133545 is about 7818.7943443986. The cubic root of 61133545 is about 393.9367764254.

The spelling of 61133545 in words is "sixty-one million, one hundred thirty-three thousand, five hundred forty-five".