61155065 has 8 divisors (see below), whose sum is σ = 73432008. Its totient is φ = 48893440.

The previous prime is 61155049. The next prime is 61155089. The reversal of 61155065 is 56055116.

It can be written as a sum of positive squares in 4 ways, for example, as 11888704 + 49266361 = 3448^2 + 7019^2 .

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

It is not a de Polignac number, because 61155065 - 2⁴ = 61155049 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8675 + ... + 14055.

It is an arithmetic number, because the mean of its divisors is an integer number (9179001).

Almost surely, 2^61155065 is an apocalyptic number.

It is an amenable number.

61155065 is a deficient number, since it is larger than the sum of its proper divisors (12276943).

61155065 is a wasteful number, since it uses less digits than its factorization.

61155065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7659.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 61155065 is about 7820.1703945630. The cubic root of 61155065 is about 393.9829950488.

The spelling of 61155065 in words is "sixty-one million, one hundred fifty-five thousand, sixty-five".