61097766913 has 8 divisors (see below), whose sum is σ = 64720007208. Its totient is φ = 57478665984.

The previous prime is 61097766901. The next prime is 61097766967. The reversal of 61097766913 is 31966779016.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14109401089 + 46988365824 = 118783^2 + 216768^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61097766913 - 2¹³ = 61097758721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61097766113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 744706 + ... + 822667.

It is an arithmetic number, because the mean of its divisors is an integer number (8090000901).

Almost surely, 2^61097766913 is an apocalyptic number.

It is an amenable number.

61097766913 is a deficient number, since it is larger than the sum of its proper divisors (3622240295).

61097766913 is a wasteful number, since it uses less digits than its factorization.

61097766913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1569683.

The product of its (nonzero) digits is 2571912, while the sum is 55.

The spelling of 61097766913 in words is "sixty-one billion, ninety-seven million, seven hundred sixty-six thousand, nine hundred thirteen".