61690189313 has 4 divisors (see below), whose sum is σ = 61954954308. Its totient is φ = 61425424320.

The previous prime is 61690189261. The next prime is 61690189343. The reversal of 61690189313 is 31398109616.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30941865409 + 30748323904 = 175903^2 + 175352^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61690189313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61690189343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132382148 + ... + 132382613.

It is an arithmetic number, because the mean of its divisors is an integer number (15488738577).

Almost surely, 2^61690189313 is an apocalyptic number.

It is an amenable number.

61690189313 is a deficient number, since it is larger than the sum of its proper divisors (264764995).

61690189313 is a wasteful number, since it uses less digits than its factorization.

61690189313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264764994.

The product of its (nonzero) digits is 209952, while the sum is 47.

The spelling of 61690189313 in words is "sixty-one billion, six hundred ninety million, one hundred eighty-nine thousand, three hundred thirteen".