61664830508 has 6 divisors (see below), whose sum is σ = 107913453396. Its totient is φ = 30832415252.

The previous prime is 61664830471. The next prime is 61664830523. The reversal of 61664830508 is 80503846616.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7708103810 + ... + 7708103817.

It is an arithmetic number, because the mean of its divisors is an integer number (17985575566).

Almost surely, 2^61664830508 is an apocalyptic number.

It is an amenable number.

61664830508 is a deficient number, since it is larger than the sum of its proper divisors (46248622888).

61664830508 is a wasteful number, since it uses less digits than its factorization.

61664830508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15416207631 (or 15416207629 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 47.

The spelling of 61664830508 in words is "sixty-one billion, six hundred sixty-four million, eight hundred thirty thousand, five hundred eight".