61645312510 has 16 divisors (see below), whose sum is σ = 111153880656. Its totient is φ = 24615387648.

The previous prime is 61645312493. The next prime is 61645312537. The reversal of 61645312510 is 1521354616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5336112 + ... + 5347651.

It is an arithmetic number, because the mean of its divisors is an integer number (6947117541).

Almost surely, 2^61645312510 is an apocalyptic number.

61645312510 is a deficient number, since it is larger than the sum of its proper divisors (49508568146).

61645312510 is a wasteful number, since it uses less digits than its factorization.

61645312510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10684347.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 61645312510 in words is "sixty-one billion, six hundred forty-five million, three hundred twelve thousand, five hundred ten".