2641391642918 has 16 divisors (see below), whose sum is σ = 4633404610560. Its totient is φ = 1105698827016.

The previous prime is 2641391642917. The next prime is 2641391642941. The reversal of 2641391642918 is 8192461931462.

It is a super-2 number, since 2×2641391642918² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2641391642917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2193846278 + ... + 2193847481.

It is an arithmetic number, because the mean of its divisors is an integer number (289587788160).

Almost surely, 2^{2641391642918} is an apocalyptic number.

2641391642918 is a deficient number, since it is larger than the sum of its proper divisors (1992012967642).

2641391642918 is a wasteful number, since it uses less digits than its factorization.

2641391642918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4387693811.

The product of its digits is 4478976, while the sum is 56.

The spelling of 2641391642918 in words is "two trillion, six hundred forty-one billion, three hundred ninety-one million, six hundred forty-two thousand, nine hundred eighteen".