61643800610 has 16 divisors (see below), whose sum is σ = 126810104256. Its totient is φ = 21135017328.

The previous prime is 61643800601. The next prime is 61643800643. The reversal of 61643800610 is 1600834616.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 440312792 + ... + 440312931.

It is an arithmetic number, because the mean of its divisors is an integer number (7925631516).

Almost surely, 2^61643800610 is an apocalyptic number.

61643800610 is an abundant number, since it is smaller than the sum of its proper divisors (65166303646).

61643800610 is a wasteful number, since it uses less digits than its factorization.

61643800610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880625737.

The product of its (nonzero) digits is 20736, while the sum is 35.

The spelling of 61643800610 in words is "sixty-one billion, six hundred forty-three million, eight hundred thousand, six hundred ten".