6551640164340 has 48 divisors (see below), whose sum is σ = 20382880512960. Its totient is φ = 1747104043680.

The previous prime is 6551640164323. The next prime is 6551640164357. The reversal of 6551640164340 is 434610461556.

6551640164340 is a `hidden beast` number, since 6 + 5 + 516 + 40 + 1 + 64 + 34 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (6551640164323) and next prime (6551640164357).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6066332946 + ... + 6066334025.

It is an arithmetic number, because the mean of its divisors is an integer number (424643344020).

Almost surely, 2^{6551640164340} is an apocalyptic number.

6551640164340 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6551640164340 is an abundant number, since it is smaller than the sum of its proper divisors (13831240348620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6551640164340 is a wasteful number, since it uses less digits than its factorization.

6551640164340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12132666989 (or 12132666981 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The spelling of 6551640164340 in words is "six trillion, five hundred fifty-one billion, six hundred forty million, one hundred sixty-four thousand, three hundred forty".