61311761743 has 16 divisors (see below), whose sum is σ = 64732187520. Its totient is φ = 58006368000.

The previous prime is 61311761737. The next prime is 61311761747. The reversal of 61311761743 is 34716711316.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 61311761743 - 2²⁵ = 61278207311 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61311761696 and 61311761705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61311761747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64093 + ... + 355993.

It is an arithmetic number, because the mean of its divisors is an integer number (4045761720).

Almost surely, 2^61311761743 is an apocalyptic number.

61311761743 is a deficient number, since it is larger than the sum of its proper divisors (3420425777).

61311761743 is a wasteful number, since it uses less digits than its factorization.

61311761743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292098.

The product of its digits is 63504, while the sum is 40.

The spelling of 61311761743 in words is "sixty-one billion, three hundred eleven million, seven hundred sixty-one thousand, seven hundred forty-three".