61616277607 has 4 divisors (see below), whose sum is σ = 61618182840. Its totient is φ = 61614372376.

The previous prime is 61616277559. The next prime is 61616277719. The reversal of 61616277607 is 70677261616.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61616277607 is a prime.

It is a super-2 number, since 2×61616277607² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61616277007) 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 3 ways as a sum of consecutive naturals, for example, 903253 + ... + 969070.

It is an arithmetic number, because the mean of its divisors is an integer number (15404545710).

Almost surely, 2^61616277607 is an apocalyptic number.

61616277607 is a deficient number, since it is larger than the sum of its proper divisors (1905233).

61616277607 is a wasteful number, since it uses less digits than its factorization.

61616277607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1905232.

The product of its (nonzero) digits is 889056, while the sum is 49.

The spelling of 61616277607 in words is "sixty-one billion, six hundred sixteen million, two hundred seventy-seven thousand, six hundred seven".