61705143430 has 64 divisors (see below), whose sum is σ = 129065218560. Its totient is φ = 20802380544.

The previous prime is 61705143421. The next prime is 61705143431. The reversal of 61705143430 is 3434150716.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61705143431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2628786 + ... + 2652154.

It is an arithmetic number, because the mean of its divisors is an integer number (2016644040).

Almost surely, 2^61705143430 is an apocalyptic number.

61705143430 is an abundant number, since it is smaller than the sum of its proper divisors (67360075130).

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

61705143430 is a wasteful number, since it uses less digits than its factorization.

61705143430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24013.

The product of its (nonzero) digits is 30240, while the sum is 34.

The spelling of 61705143430 in words is "sixty-one billion, seven hundred five million, one hundred forty-three thousand, four hundred thirty".