401216056061 has 4 divisors (see below), whose sum is σ = 406712166492. Its totient is φ = 395719945632.

The previous prime is 401216056049. The next prime is 401216056063. The reversal of 401216056061 is 160650612104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 88881496900 + 312334559161 = 298130^2 + 558869^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401216056061 is a prime.

It is a super-2 number, since 2×401216056061² (a number of 24 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 (401216056063) 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, 2748055106 + ... + 2748055251.

It is an arithmetic number, because the mean of its divisors is an integer number (101678041623).

Almost surely, 2^401216056061 is an apocalyptic number.

It is an amenable number.

401216056061 is a deficient number, since it is larger than the sum of its proper divisors (5496110431).

401216056061 is an equidigital number, since it uses as much as digits as its factorization.

401216056061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5496110430.

The product of its (nonzero) digits is 8640, while the sum is 32.

Adding to 401216056061 its reverse (160650612104), we get a palindrome (561866668165).

The spelling of 401216056061 in words is "four hundred one billion, two hundred sixteen million, fifty-six thousand, sixty-one".