611401203611 has 48 divisors (see below), whose sum is σ = 721947438240. Its totient is φ = 513257472000.

The previous prime is 611401203593. The next prime is 611401203631. The reversal of 611401203611 is 116302104116.

It is a de Polignac number, because none of the positive numbers 2^k-611401203611 is a prime.

It is a super-2 number, since 2×611401203611² (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 (611401203631) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 81636155 + ... + 81643643.

It is an arithmetic number, because the mean of its divisors is an integer number (15040571630).

Almost surely, 2^611401203611 is an apocalyptic number.

611401203611 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

611401203611 is a deficient number, since it is larger than the sum of its proper divisors (110546234629).

611401203611 is a wasteful number, since it uses less digits than its factorization.

611401203611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8016 (or 7999 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

Adding to 611401203611 its reverse (116302104116), we get a palindrome (727703307727).

The spelling of 611401203611 in words is "six hundred eleven billion, four hundred one million, two hundred three thousand, six hundred eleven".