61772653 has 4 divisors (see below), whose sum is σ = 61854588. Its totient is φ = 61690720.

The previous prime is 61772621. The next prime is 61772663. The reversal of 61772653 is 35627716.

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 5026564 + 56746089 = 2242^2 + 7533^2 .

It is a cyclic number.

It is not a de Polignac number, because 61772653 - 2⁵ = 61772621 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 (61772603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39826 + ... + 41347.

It is an arithmetic number, because the mean of its divisors is an integer number (15463647).

Almost surely, 2^61772653 is an apocalyptic number.

It is an amenable number.

61772653 is a deficient number, since it is larger than the sum of its proper divisors (81935).

61772653 is an equidigital number, since it uses as much as digits as its factorization.

61772653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81934.

The product of its digits is 52920, while the sum is 37.

The square root of 61772653 is about 7859.5580664564. The cubic root of 61772653 is about 395.3047970597.

The spelling of 61772653 in words is "sixty-one million, seven hundred seventy-two thousand, six hundred fifty-three".