61111100478 has 16 divisors (see below), whose sum is σ = 122290617600. Its totient is φ = 20358964056.

The previous prime is 61111100437. The next prime is 61111100503. The reversal of 61111100478 is 87400111116.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2839078 + ... + 2860521.

It is an arithmetic number, because the mean of its divisors is an integer number (7643163600).

Almost surely, 2^61111100478 is an apocalyptic number.

61111100478 is an abundant number, since it is smaller than the sum of its proper divisors (61179517122).

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

61111100478 is a wasteful number, since it uses less digits than its factorization.

61111100478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5701391.

The product of its (nonzero) digits is 1344, while the sum is 30.

The spelling of 61111100478 in words is "sixty-one billion, one hundred eleven million, one hundred thousand, four hundred seventy-eight".