611401203631 has 2 divisors, whose sum is σ = 611401203632. Its totient is φ = 611401203630.

The previous prime is 611401203593. The next prime is 611401203701. The reversal of 611401203631 is 136302104116.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 611401203631 - 2⁷ = 611401203503 is a prime.

It is a super-2 number, since 2×611401203631² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 611401203631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (611401203031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305700601815 + 305700601816.

It is an arithmetic number, because the mean of its divisors is an integer number (305700601816).

Almost surely, 2^611401203631 is an apocalyptic number.

611401203631 is a deficient number, since it is larger than the sum of its proper divisors (1).

611401203631 is an equidigital number, since it uses as much as digits as its factorization.

611401203631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

Adding to 611401203631 its reverse (136302104116), we get a palindrome (747703307747).

The spelling of 611401203631 in words is "six hundred eleven billion, four hundred one million, two hundred three thousand, six hundred thirty-one".