61111419420 has 24 divisors (see below), whose sum is σ = 171111974544. Its totient is φ = 16296378496.

The previous prime is 61111419403. The next prime is 61111419469. The reversal of 61111419420 is 2491411116.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 509261769 + ... + 509261888.

It is an arithmetic number, because the mean of its divisors is an integer number (7129665606).

Almost surely, 2^61111419420 is an apocalyptic number.

61111419420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61111419420 is an abundant number, since it is smaller than the sum of its proper divisors (110000555124).

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

61111419420 is a wasteful number, since it uses less digits than its factorization.

61111419420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018523669 (or 1018523667 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 30.

The spelling of 61111419420 in words is "sixty-one billion, one hundred eleven million, four hundred nineteen thousand, four hundred twenty".