611403640231 has 2 divisors, whose sum is σ = 611403640232. Its totient is φ = 611403640230.

The previous prime is 611403640219. The next prime is 611403640271. The reversal of 611403640231 is 132046304116.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 611403640231 - 2³¹ = 609256156583 is a prime.

It is a super-3 number, since 3×611403640231³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 611403640193 and 611403640202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (611403640271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305701820115 + 305701820116.

It is an arithmetic number, because the mean of its divisors is an integer number (305701820116).

Almost surely, 2^611403640231 is an apocalyptic number.

611403640231 is a deficient number, since it is larger than the sum of its proper divisors (1).

611403640231 is an equidigital number, since it uses as much as digits as its factorization.

611403640231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 31.

Adding to 611403640231 its reverse (132046304116), we get a palindrome (743449944347).

The spelling of 611403640231 in words is "six hundred eleven billion, four hundred three million, six hundred forty thousand, two hundred thirty-one".