61610155 has 4 divisors (see below), whose sum is σ = 73932192. Its totient is φ = 49288120.

The previous prime is 61610147. The next prime is 61610177. The reversal of 61610155 is 55101616.

61610155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 61610155 - 2³ = 61610147 is a prime.

It is a super-2 number, since 2×61610155² = 7591622398248050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6161011 + ... + 6161020.

It is an arithmetic number, because the mean of its divisors is an integer number (18483048).

Almost surely, 2^61610155 is an apocalyptic number.

61610155 is a deficient number, since it is larger than the sum of its proper divisors (12322037).

61610155 is a wasteful number, since it uses less digits than its factorization.

61610155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12322036.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 61610155 is about 7849.2136548829. The cubic root of 61610155 is about 394.9578655052.

It can be divided in two parts, 6 and 1610155, that added together give a palindrome (1610161).

The spelling of 61610155 in words is "sixty-one million, six hundred ten thousand, one hundred fifty-five".