61927745 has 24 divisors (see below), whose sum is σ = 85587840. Its totient is φ = 42654240.

The previous prime is 61927741. The next prime is 61927759. The reversal of 61927745 is 54772916.

It is not a de Polignac number, because 61927745 - 2² = 61927741 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (61927741) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18296 + ... + 21414.

It is an arithmetic number, because the mean of its divisors is an integer number (3566160).

Almost surely, 2^61927745 is an apocalyptic number.

It is an amenable number.

61927745 is a deficient number, since it is larger than the sum of its proper divisors (23660095).

61927745 is a wasteful number, since it uses less digits than its factorization.

61927745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3173 (or 3154 counting only the distinct ones).

The product of its digits is 105840, while the sum is 41.

The square root of 61927745 is about 7869.4183393692. The cubic root of 61927745 is about 395.6353498803.

The spelling of 61927745 in words is "sixty-one million, nine hundred twenty-seven thousand, seven hundred forty-five".