61540745 has 8 divisors (see below), whose sum is σ = 84398784. Its totient is φ = 42199344.

The previous prime is 61540733. The next prime is 61540747. The reversal of 61540745 is 54704516.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61540745 - 2⁶ = 61540681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61540747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 879119 + ... + 879188.

It is an arithmetic number, because the mean of its divisors is an integer number (10549848).

Almost surely, 2^61540745 is an apocalyptic number.

It is an amenable number.

61540745 is a deficient number, since it is larger than the sum of its proper divisors (22858039).

61540745 is a wasteful number, since it uses less digits than its factorization.

61540745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1758319.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 61540745 is about 7844.7909468640. The cubic root of 61540745 is about 394.8094899288.

The spelling of 61540745 in words is "sixty-one million, five hundred forty thousand, seven hundred forty-five".