72416243101661 has 8 divisors (see below), whose sum is σ = 72937784004960. Its totient is φ = 71894710209168.

The previous prime is 72416243101613. The next prime is 72416243101667. The reversal of 72416243101661 is 16610134261427.

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 72416243101661 - 2²² = 72416238907357 is a prime.

It is a super-2 number, since 2×72416243101661² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72416243101667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16773650 + ... + 20644316.

It is an arithmetic number, because the mean of its divisors is an integer number (9117223000620).

Almost surely, 2^{72416243101661} is an apocalyptic number.

It is an amenable number.

72416243101661 is a deficient number, since it is larger than the sum of its proper divisors (521540903299).

72416243101661 is a wasteful number, since it uses less digits than its factorization.

72416243101661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4005403.

The product of its (nonzero) digits is 290304, while the sum is 44.

The spelling of 72416243101661 in words is "seventy-two trillion, four hundred sixteen billion, two hundred forty-three million, one hundred one thousand, six hundred sixty-one".