61721752 has 32 divisors (see below), whose sum is σ = 119188800. Its totient is φ = 29952000.

The previous prime is 61721749. The next prime is 61721761. The reversal of 61721752 is 25712716.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37752 + ... + 39352.

It is an arithmetic number, because the mean of its divisors is an integer number (3724650).

Almost surely, 2^61721752 is an apocalyptic number.

It is an amenable number.

61721752 is a deficient number, since it is larger than the sum of its proper divisors (57467048).

61721752 is a wasteful number, since it uses less digits than its factorization.

61721752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1747 (or 1743 counting only the distinct ones).

The product of its digits is 5880, while the sum is 31.

The square root of 61721752 is about 7856.3192399495. The cubic root of 61721752 is about 395.1961894599.

The spelling of 61721752 in words is "sixty-one million, seven hundred twenty-one thousand, seven hundred fifty-two".