61721852 has 12 divisors (see below), whose sum is σ = 108293640. Its totient is φ = 30780816.

The previous prime is 61721827. The next prime is 61721867. The reversal of 61721852 is 25812716.

It is a super-3 number, since 3×61721852³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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, 18278 + ... + 21389.

It is an arithmetic number, because the mean of its divisors is an integer number (9024470).

Almost surely, 2^61721852 is an apocalyptic number.

It is an amenable number.

61721852 is a deficient number, since it is larger than the sum of its proper divisors (46571788).

61721852 is a wasteful number, since it uses less digits than its factorization.

61721852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40060 (or 40058 counting only the distinct ones).

The product of its digits is 6720, while the sum is 32.

The square root of 61721852 is about 7856.3256042504. The cubic root of 61721852 is about 395.1964028887.

The spelling of 61721852 in words is "sixty-one million, seven hundred twenty-one thousand, eight hundred fifty-two".