61111081798 has 16 divisors (see below), whose sum is σ = 98723138976. Its totient is φ = 28203618240.

The previous prime is 61111081771. The next prime is 61111081853. The reversal of 61111081798 is 89718011116.

It is a congruent number.

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, 550938 + ... + 652498.

It is an arithmetic number, because the mean of its divisors is an integer number (6170196186).

Almost surely, 2^61111081798 is an apocalyptic number.

61111081798 is a deficient number, since it is larger than the sum of its proper divisors (37612057178).

61111081798 is a wasteful number, since it uses less digits than its factorization.

61111081798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124719.

The product of its (nonzero) digits is 24192, while the sum is 43.

The spelling of 61111081798 in words is "sixty-one billion, one hundred eleven million, eighty-one thousand, seven hundred ninety-eight".