61072144 has 40 divisors (see below), whose sum is σ = 139901760. Its totient is φ = 25269888.

The previous prime is 61072127. The next prime is 61072181. The reversal of 61072144 is 44127016.

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, 6154 + ... + 12649.

It is an arithmetic number, because the mean of its divisors is an integer number (3497544).

Almost surely, 2^61072144 is an apocalyptic number.

It is an amenable number.

61072144 is an abundant number, since it is smaller than the sum of its proper divisors (78829616).

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

61072144 is a wasteful number, since it uses less digits than its factorization.

61072144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18847 (or 18841 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 61072144 is about 7814.8668574711. The cubic root of 61072144 is about 393.8048455054.

It can be divided in two parts, 61072 and 144, that added together give a palindrome (61216).

The spelling of 61072144 in words is "sixty-one million, seventy-two thousand, one hundred forty-four".