61791168646 has 16 divisors (see below), whose sum is σ = 94941904464. Its totient is φ = 30145377024.

The previous prime is 61791168631. The next prime is 61791168707. The reversal of 61791168646 is 64686119716.

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, 295011 + ... + 458926.

It is an arithmetic number, because the mean of its divisors is an integer number (5933869029).

Almost surely, 2^61791168646 is an apocalyptic number.

61791168646 is a deficient number, since it is larger than the sum of its proper divisors (33150735818).

61791168646 is a wasteful number, since it uses less digits than its factorization.

61791168646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754935.

The product of its digits is 2612736, while the sum is 55.

The spelling of 61791168646 in words is "sixty-one billion, seven hundred ninety-one million, one hundred sixty-eight thousand, six hundred forty-six".