61860800691 has 12 divisors (see below), whose sum is σ = 89954186400. Its totient is φ = 40963750800.

The previous prime is 61860800681. The next prime is 61860800803. The reversal of 61860800691 is 19600806816.

It is a happy number.

It is not a de Polignac number, because 61860800691 - 2¹⁵ = 61860767923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61860800641) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 23063835 + ... + 23066516.

It is an arithmetic number, because the mean of its divisors is an integer number (7496182200).

Almost surely, 2^61860800691 is an apocalyptic number.

61860800691 is a deficient number, since it is larger than the sum of its proper divisors (28093385709).

61860800691 is a wasteful number, since it uses less digits than its factorization.

61860800691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46130506 (or 46130503 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The spelling of 61860800691 in words is "sixty-one billion, eight hundred sixty million, eight hundred thousand, six hundred ninety-one".