61040545 has 16 divisors (see below), whose sum is σ = 75525120. Its totient is φ = 47335104.

The previous prime is 61040543. The next prime is 61040587. The reversal of 61040545 is 54504016.

It is a cyclic number.

It is not a de Polignac number, because 61040545 - 2¹ = 61040543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61040543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24424 + ... + 26806.

It is an arithmetic number, because the mean of its divisors is an integer number (4720320).

Almost surely, 2^61040545 is an apocalyptic number.

It is an amenable number.

61040545 is a deficient number, since it is larger than the sum of its proper divisors (14484575).

61040545 is a wasteful number, since it uses less digits than its factorization.

61040545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2544.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 61040545 is about 7812.8448723880. The cubic root of 61040545 is about 393.7369149931.

The spelling of 61040545 in words is "sixty-one million, forty thousand, five hundred forty-five".