611615340631 has 4 divisors (see below), whose sum is σ = 618487423200. Its totient is φ = 604743258064.

The previous prime is 611615340629. The next prime is 611615340641. The reversal of 611615340631 is 136043516116.

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

It is a cyclic number.

It is not a de Polignac number, because 611615340631 - 2¹ = 611615340629 is a prime.

It is a super-2 number, since 2×611615340631² (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 (611615340641) 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, 3436041151 + ... + 3436041328.

It is an arithmetic number, because the mean of its divisors is an integer number (154621855800).

Almost surely, 2^611615340631 is an apocalyptic number.

611615340631 is a deficient number, since it is larger than the sum of its proper divisors (6872082569).

611615340631 is an equidigital number, since it uses as much as digits as its factorization.

611615340631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6872082568.

The product of its (nonzero) digits is 38880, while the sum is 37.

Adding to 611615340631 its reverse (136043516116), we get a palindrome (747658856747).

The spelling of 611615340631 in words is "six hundred eleven billion, six hundred fifteen million, three hundred forty thousand, six hundred thirty-one".