61156446 has 48 divisors (see below), whose sum is σ = 139977264. Its totient is φ = 17703936.

The previous prime is 61156441. The next prime is 61156457. The reversal of 61156446 is 64465116.

It is a happy number.

It is a super-2 number, since 2×61156446² = 7480221774701832, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61156441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21186 + ... + 23898.

It is an arithmetic number, because the mean of its divisors is an integer number (2916193).

Almost surely, 2^61156446 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61156446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69988632).

61156446 is an abundant number, since it is smaller than the sum of its proper divisors (78820818).

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

61156446 is a wasteful number, since it uses less digits than its factorization.

61156446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2765 (or 2748 counting only the distinct ones).

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

The square root of 61156446 is about 7820.2586913733. The cubic root of 61156446 is about 393.9859606600.

It can be divided in two parts, 6115 and 6446, that added together give a triangular number (12561 = T₁₅₈).

The spelling of 61156446 in words is "sixty-one million, one hundred fifty-six thousand, four hundred forty-six".