61415668367 has 4 divisors (see below), whose sum is σ = 61446579096. Its totient is φ = 61384757640.

The previous prime is 61415668361. The next prime is 61415668387. The reversal of 61415668367 is 76386651416.

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-61415668367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61415668361) 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, 15452384 + ... + 15456357.

It is an arithmetic number, because the mean of its divisors is an integer number (15361644774).

Almost surely, 2^61415668367 is an apocalyptic number.

61415668367 is a deficient number, since it is larger than the sum of its proper divisors (30910729).

61415668367 is a wasteful number, since it uses less digits than its factorization.

61415668367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30910728.

The product of its digits is 4354560, while the sum is 53.

The spelling of 61415668367 in words is "sixty-one billion, four hundred fifteen million, six hundred sixty-eight thousand, three hundred sixty-seven".