61156115 has 16 divisors (see below), whose sum is σ = 74996928. Its totient is φ = 47863296.

The previous prime is 61156111. The next prime is 61156127. The reversal of 61156115 is 51165116.

61156115 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 61156115 - 2² = 61156111 is a prime.

It is a super-4 number, since 4×61156115⁴ (a number of 32 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61156111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49394 + ... + 50616.

It is an arithmetic number, because the mean of its divisors is an integer number (4687308).

Almost surely, 2^61156115 is an apocalyptic number.

61156115 is a deficient number, since it is larger than the sum of its proper divisors (13840813).

61156115 is a wasteful number, since it uses less digits than its factorization.

61156115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1438.

The product of its digits is 900, while the sum is 26.

The square root of 61156115 is about 7820.2375283619. The cubic root of 61156115 is about 393.9852498622.

Subtracting from 61156115 its reverse (51165116), we obtain a palindrome (9990999).

The spelling of 61156115 in words is "sixty-one million, one hundred fifty-six thousand, one hundred fifteen".