61216201517 has 32 divisors (see below), whose sum is σ = 68153809920. Its totient is φ = 54722511360.

The previous prime is 61216201489. The next prime is 61216201523. The reversal of 61216201517 is 71510261216.

It is a cyclic number.

It is not a de Polignac number, because 61216201517 - 2¹² = 61216197421 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 (61216201577) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14028578 + ... + 14032940.

It is an arithmetic number, because the mean of its divisors is an integer number (2129806560).

Almost surely, 2^61216201517 is an apocalyptic number.

It is an amenable number.

61216201517 is a deficient number, since it is larger than the sum of its proper divisors (6937608403).

61216201517 is a wasteful number, since it uses less digits than its factorization.

61216201517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4833.

The product of its (nonzero) digits is 5040, while the sum is 32.

The spelling of 61216201517 in words is "sixty-one billion, two hundred sixteen million, two hundred one thousand, five hundred seventeen".