61711221472 has 12 divisors (see below), whose sum is σ = 121493967336. Its totient is φ = 30855610720.

The previous prime is 61711221367. The next prime is 61711221497. The reversal of 61711221472 is 27412211716.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 964237804 + ... + 964237867.

It is an arithmetic number, because the mean of its divisors is an integer number (10124497278).

Almost surely, 2^61711221472 is an apocalyptic number.

It is an amenable number.

61711221472 is a deficient number, since it is larger than the sum of its proper divisors (59782745864).

61711221472 is a wasteful number, since it uses less digits than its factorization.

61711221472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1928475681 (or 1928475673 counting only the distinct ones).

The product of its digits is 9408, while the sum is 34.

The spelling of 61711221472 in words is "sixty-one billion, seven hundred eleven million, two hundred twenty-one thousand, four hundred seventy-two".