61616605099 has 8 divisors (see below), whose sum is σ = 70449867488. Its totient is φ = 52791065280.

The previous prime is 61616605091. The next prime is 61616605129. The reversal of 61616605099 is 99050661616.

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 61616605099 - 2³ = 61616605091 is a prime.

It is a super-2 number, since 2×61616605099² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61616605091) 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 7 ways as a sum of consecutive naturals, for example, 1913532 + ... + 1945465.

It is an arithmetic number, because the mean of its divisors is an integer number (8806233436).

Almost surely, 2^61616605099 is an apocalyptic number.

61616605099 is a deficient number, since it is larger than the sum of its proper divisors (8833262389).

61616605099 is a wasteful number, since it uses less digits than its factorization.

61616605099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3861285.

The product of its (nonzero) digits is 524880, while the sum is 49.

The spelling of 61616605099 in words is "sixty-one billion, six hundred sixteen million, six hundred five thousand, ninety-nine".