61845579243 has 32 divisors (see below), whose sum is σ = 105638784000. Its totient is φ = 35027572608.

The previous prime is 61845579193. The next prime is 61845579247. The reversal of 61845579243 is 34297554816.

It is a happy number.

61845579243 is a `hidden beast` number, since 6 + 1 + 8 + 45 + 579 + 24 + 3 = 666.

It is not a de Polignac number, because 61845579243 - 2⁶ = 61845579179 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61845579243.

It is not an unprimeable number, because it can be changed into a prime (61845579247) 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, 1426543 + ... + 1469256.

It is an arithmetic number, because the mean of its divisors is an integer number (3301212000).

Almost surely, 2^61845579243 is an apocalyptic number.

61845579243 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

61845579243 is a deficient number, since it is larger than the sum of its proper divisors (43793204757).

61845579243 is a wasteful number, since it uses less digits than its factorization.

61845579243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2895928 (or 2895922 counting only the distinct ones).

The product of its digits is 7257600, while the sum is 54.

The spelling of 61845579243 in words is "sixty-one billion, eight hundred forty-five million, five hundred seventy-nine thousand, two hundred forty-three".