61612140 has 48 divisors (see below), whose sum is σ = 173039328. Its totient is φ = 16379904.

The previous prime is 61612139. The next prime is 61612151. The reversal of 61612140 is 4121616.

It is a super-3 number, since 3×61612140³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21004 + ... + 23756.

It is an arithmetic number, because the mean of its divisors is an integer number (3604986).

Almost surely, 2^61612140 is an apocalyptic number.

61612140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61612140 is an abundant number, since it is smaller than the sum of its proper divisors (111427188).

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

61612140 is a wasteful number, since it uses less digits than its factorization.

61612140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3138 (or 3136 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 61612140 is about 7849.3400996517. The cubic root of 61612140 is about 394.9621071379.

Adding to 61612140 its reverse (4121616), we get a palindrome (65733756).

The spelling of 61612140 in words is "sixty-one million, six hundred twelve thousand, one hundred forty".