61404331332215 has 4 divisors (see below), whose sum is σ = 73685197598664. Its totient is φ = 49123465065768.

The previous prime is 61404331332143. The next prime is 61404331332229. The reversal of 61404331332215 is 51223313340416.

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-61404331332215 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6140433133217 + ... + 6140433133226.

It is an arithmetic number, because the mean of its divisors is an integer number (18421299399666).

Almost surely, 2^{61404331332215} is an apocalyptic number.

61404331332215 is a deficient number, since it is larger than the sum of its proper divisors (12280866266449).

61404331332215 is a wasteful number, since it uses less digits than its factorization.

61404331332215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12280866266448.

The product of its (nonzero) digits is 155520, while the sum is 38.

The spelling of 61404331332215 in words is "sixty-one trillion, four hundred four billion, three hundred thirty-one million, three hundred thirty-two thousand, two hundred fifteen".