61222000072 has 32 divisors (see below), whose sum is σ = 116011415520. Its totient is φ = 30287013120.

The previous prime is 61222000069. The next prime is 61222000141. The reversal of 61222000072 is 27000022216.

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, 266503 + ... + 439849.

It is an arithmetic number, because the mean of its divisors is an integer number (3625356735).

Almost surely, 2^61222000072 is an apocalyptic number.

It is an amenable number.

61222000072 is a deficient number, since it is larger than the sum of its proper divisors (54789415448).

61222000072 is a wasteful number, since it uses less digits than its factorization.

61222000072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173821 (or 173817 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

Adding to 61222000072 its reverse (27000022216), we get a palindrome (88222022288).

The spelling of 61222000072 in words is "sixty-one billion, two hundred twenty-two million, seventy-two", and thus it is an aban number.