61117222890 has 32 divisors (see below), whose sum is σ = 146813679360. Its totient is φ = 16283221184.

The previous prime is 61117222871. The next prime is 61117222913. The reversal of 61117222890 is 9822271116.

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, 885234 + ... + 951773.

It is an arithmetic number, because the mean of its divisors is an integer number (4587927480).

Almost surely, 2^61117222890 is an apocalyptic number.

61117222890 is an abundant number, since it is smaller than the sum of its proper divisors (85696456470).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61117222890 is a wasteful number, since it uses less digits than its factorization.

61117222890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1838126.

The product of its (nonzero) digits is 24192, while the sum is 39.

The spelling of 61117222890 in words is "sixty-one billion, one hundred seventeen million, two hundred twenty-two thousand, eight hundred ninety".