61890344135 has 8 divisors (see below), whose sum is σ = 74532715056. Its totient is φ = 49336073920.

The previous prime is 61890344123. The next prime is 61890344137. The reversal of 61890344135 is 53144309816.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61890344135 - 2¹⁶ = 61890278599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61890344137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22023629 + ... + 22026438.

It is an arithmetic number, because the mean of its divisors is an integer number (9316589382).

Almost surely, 2^61890344135 is an apocalyptic number.

61890344135 is a deficient number, since it is larger than the sum of its proper divisors (12642370921).

61890344135 is a wasteful number, since it uses less digits than its factorization.

61890344135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44050353.

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 61890344135 in words is "sixty-one billion, eight hundred ninety million, three hundred forty-four thousand, one hundred thirty-five".