61156453 has 4 divisors (see below), whose sum is σ = 61177068. Its totient is φ = 61135840.

The previous prime is 61156441. The next prime is 61156457. The reversal of 61156453 is 35465116.

61156453 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 can be written as a sum of positive squares in 2 ways, for example, as 43322724 + 17833729 = 6582^2 + 4223^2 .

It is a cyclic number.

It is not a de Polignac number, because 61156453 - 2¹⁷ = 61025381 is a prime.

It is a super-2 number, since 2×61156453² = 7480223487082418, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61156457) 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 3 ways as a sum of consecutive naturals, for example, 4918 + ... + 12103.

It is an arithmetic number, because the mean of its divisors is an integer number (15294267).

Almost surely, 2^61156453 is an apocalyptic number.

It is an amenable number.

61156453 is a deficient number, since it is larger than the sum of its proper divisors (20615).

61156453 is a wasteful number, since it uses less digits than its factorization.

61156453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20614.

The product of its digits is 10800, while the sum is 31.

The square root of 61156453 is about 7820.2591389288. The cubic root of 61156453 is about 393.9859756919.

The spelling of 61156453 in words is "sixty-one million, one hundred fifty-six thousand, four hundred fifty-three".