61645020010 has 16 divisors (see below), whose sum is σ = 126812612736. Its totient is φ = 21135435408.

The previous prime is 61645020007. The next prime is 61645020043. The reversal of 61645020010 is 1002054616.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 440321502 + ... + 440321641.

It is an arithmetic number, because the mean of its divisors is an integer number (7925788296).

Almost surely, 2^61645020010 is an apocalyptic number.

61645020010 is an abundant number, since it is smaller than the sum of its proper divisors (65167592726).

61645020010 is a wasteful number, since it uses less digits than its factorization.

61645020010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880643157.

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 61645020010 its reverse (1002054616), we get a palindrome (62647074626).

The spelling of 61645020010 in words is "sixty-one billion, six hundred forty-five million, twenty thousand, ten".