416621257721 has 4 divisors (see below), whose sum is σ = 434735225472. Its totient is φ = 398507289972.

The previous prime is 416621257711. The next prime is 416621257733. The reversal of 416621257721 is 127752126614.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 416621257721 - 2³⁴ = 399441388537 is a prime.

It is a super-2 number, since 2×416621257721² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (416621257711) 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, 9056983841 + ... + 9056983886.

It is an arithmetic number, because the mean of its divisors is an integer number (108683806368).

Almost surely, 2^416621257721 is an apocalyptic number.

It is an amenable number.

416621257721 is a deficient number, since it is larger than the sum of its proper divisors (18113967751).

416621257721 is a wasteful number, since it uses less digits than its factorization.

416621257721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18113967750.

The product of its digits is 282240, while the sum is 44.

The spelling of 416621257721 in words is "four hundred sixteen billion, six hundred twenty-one million, two hundred fifty-seven thousand, seven hundred twenty-one".