61115745 has 16 divisors (see below), whose sum is σ = 99866880. Its totient is φ = 31901184.

The previous prime is 61115737. The next prime is 61115753. The reversal of 61115745 is 54751116.

It is an interprime number because it is at equal distance from previous prime (61115737) and next prime (61115753).

It is not a de Polignac number, because 61115745 - 2³ = 61115737 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42640 + ... + 44049.

It is an arithmetic number, because the mean of its divisors is an integer number (6241680).

Almost surely, 2^61115745 is an apocalyptic number.

It is an amenable number.

61115745 is a deficient number, since it is larger than the sum of its proper divisors (38751135).

61115745 is a wasteful number, since it uses less digits than its factorization.

61115745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86744.

The product of its digits is 4200, while the sum is 30.

The square root of 61115745 is about 7817.6559786166. The cubic root of 61115745 is about 393.8985390699.

The spelling of 61115745 in words is "sixty-one million, one hundred fifteen thousand, seven hundred forty-five".