61645146 has 16 divisors (see below), whose sum is σ = 124108608. Its totient is φ = 20412000.

The previous prime is 61645141. The next prime is 61645151. The reversal of 61645146 is 64154616.

It is a happy number.

61645146 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61645141) and next prime (61645151).

It is a super-2 number, since 2×61645146² = 7600248050722632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61645141) 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 7 ways as a sum of consecutive naturals, for example, 33115 + ... + 34926.

It is an arithmetic number, because the mean of its divisors is an integer number (7756788).

Almost surely, 2^61645146 is an apocalyptic number.

61645146 is an abundant number, since it is smaller than the sum of its proper divisors (62463462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61645146 is a wasteful number, since it uses less digits than its factorization.

61645146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68197.

The product of its digits is 17280, while the sum is 33.

The square root of 61645146 is about 7851.4422878857. The cubic root of 61645146 is about 395.0326224192.

The spelling of 61645146 in words is "sixty-one million, six hundred forty-five thousand, one hundred forty-six".