61106420340 has 144 divisors (see below), whose sum is σ = 212513753088. Its totient is φ = 13922468352.

The previous prime is 61106420339. The next prime is 61106420359. The reversal of 61106420340 is 4302460116.

61106420340 is a `hidden beast` number, since 6 + 1 + 10 + 642 + 0 + 3 + 4 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 316909 + ... + 471851.

It is an arithmetic number, because the mean of its divisors is an integer number (1475789952).

Almost surely, 2^61106420340 is an apocalyptic number.

61106420340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61106420340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106256876544).

61106420340 is an abundant number, since it is smaller than the sum of its proper divisors (151407332748).

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

61106420340 is a wasteful number, since it uses less digits than its factorization.

61106420340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155278 (or 155273 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 61106420340 its reverse (4302460116), we get a palindrome (65408880456).

The spelling of 61106420340 in words is "sixty-one billion, one hundred six million, four hundred twenty thousand, three hundred forty".