61221410756 has 48 divisors (see below), whose sum is σ = 117802883520. Its totient is φ = 27607816320.

The previous prime is 61221410749. The next prime is 61221410773. The reversal of 61221410756 is 65701412216.

It is a super-2 number, since 2×61221410756² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11477066 + ... + 11482398.

It is an arithmetic number, because the mean of its divisors is an integer number (2454226740).

Almost surely, 2^61221410756 is an apocalyptic number.

It is an amenable number.

61221410756 is a deficient number, since it is larger than the sum of its proper divisors (56581472764).

61221410756 is a wasteful number, since it uses less digits than its factorization.

61221410756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7364 (or 7362 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The spelling of 61221410756 in words is "sixty-one billion, two hundred twenty-one million, four hundred ten thousand, seven hundred fifty-six".