61222777898 has 4 divisors (see below), whose sum is σ = 91834166850. Its totient is φ = 30611388948.

The previous prime is 61222777883. The next prime is 61222777921. The reversal of 61222777898 is 89877722216.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 50250843889 + 10971934009 = 224167^2 + 104747^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15305694473 + ... + 15305694476.

Almost surely, 2^61222777898 is an apocalyptic number.

61222777898 is a deficient number, since it is larger than the sum of its proper divisors (30611388952).

61222777898 is a wasteful number, since it uses less digits than its factorization.

61222777898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30611388951.

The product of its digits is 9483264, while the sum is 59.

The spelling of 61222777898 in words is "sixty-one billion, two hundred twenty-two million, seven hundred seventy-seven thousand, eight hundred ninety-eight".