6426616631 has 4 divisors (see below), whose sum is σ = 6531971064. Its totient is φ = 6321262200.

The previous prime is 6426616597. The next prime is 6426616633. The reversal of 6426616631 is 1366166246.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1366166246 = 2 ⋅683083123.

It is a cyclic number.

It is not a de Polignac number, because 6426616631 - 2¹⁴ = 6426600247 is a prime.

It is a super-2 number, since 2×6426616631² = 82602802643691580322, which 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 (6426616633) 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, 52677125 + ... + 52677246.

It is an arithmetic number, because the mean of its divisors is an integer number (1632992766).

Almost surely, 2^6426616631 is an apocalyptic number.

6426616631 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

6426616631 is a deficient number, since it is larger than the sum of its proper divisors (105354433).

6426616631 is a wasteful number, since it uses less digits than its factorization.

6426616631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105354432.

The product of its digits is 186624, while the sum is 41.

The square root of 6426616631 is about 80166.1813422593. The cubic root of 6426616631 is about 1859.2057956466.

The spelling of 6426616631 in words is "six billion, four hundred twenty-six million, six hundred sixteen thousand, six hundred thirty-one".