61311609416 has 32 divisors (see below), whose sum is σ = 119157575040. Its totient is φ = 29555727168.

The previous prime is 61311609391. The next prime is 61311609419. The reversal of 61311609416 is 61490611316.

It is a super-2 number, since 2×61311609416² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61311609416.

It is not an unprimeable number, because it can be changed into a prime (61311609419) 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, 1191695 + ... + 1242078.

It is an arithmetic number, because the mean of its divisors is an integer number (3723674220).

Almost surely, 2^61311609416 is an apocalyptic number.

It is an amenable number.

61311609416 is a deficient number, since it is larger than the sum of its proper divisors (57845965624).

61311609416 is a wasteful number, since it uses less digits than its factorization.

61311609416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2433893 (or 2433889 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 38.

The spelling of 61311609416 in words is "sixty-one billion, three hundred eleven million, six hundred nine thousand, four hundred sixteen".