415401445661 has 4 divisors (see below), whose sum is σ = 416298641472. Its totient is φ = 414504249852.

The previous prime is 415401445643. The next prime is 415401445681. The reversal of 415401445661 is 166544104514.

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 415401445661 - 2³⁸ = 140523538717 is a prime.

It is a super-2 number, since 2×415401445661² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (415401445621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 448597211 + ... + 448598136.

It is an arithmetic number, because the mean of its divisors is an integer number (104074660368).

Almost surely, 2^415401445661 is an apocalyptic number.

It is an amenable number.

415401445661 is a deficient number, since it is larger than the sum of its proper divisors (897195811).

415401445661 is an equidigital number, since it uses as much as digits as its factorization.

415401445661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897195810.

The product of its (nonzero) digits is 230400, while the sum is 41.

The spelling of 415401445661 in words is "four hundred fifteen billion, four hundred one million, four hundred forty-five thousand, six hundred sixty-one".