61856453 has 4 divisors (see below), whose sum is σ = 64545888. Its totient is φ = 59167020.

The previous prime is 61856441. The next prime is 61856467. The reversal of 61856453 is 35465816.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61856453 - 2⁴ = 61856437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61853453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1344683 + ... + 1344728.

It is an arithmetic number, because the mean of its divisors is an integer number (16136472).

Almost surely, 2^61856453 is an apocalyptic number.

It is an amenable number.

61856453 is a deficient number, since it is larger than the sum of its proper divisors (2689435).

61856453 is a wasteful number, since it uses less digits than its factorization.

61856453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2689434.

The product of its digits is 86400, while the sum is 38.

The square root of 61856453 is about 7864.8873482079. The cubic root of 61856453 is about 395.4834714513.

The spelling of 61856453 in words is "sixty-one million, eight hundred fifty-six thousand, four hundred fifty-three".