1656766643140 has 48 divisors (see below), whose sum is σ = 4026572121600. Its totient is φ = 560843966592.

The previous prime is 1656766643113. The next prime is 1656766643143. The reversal of 1656766643140 is 413466676561.

It is not an unprimeable number, because it can be changed into a prime (1656766643143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74887975 + ... + 74910094.

It is an arithmetic number, because the mean of its divisors is an integer number (83886919200).

Almost surely, 2^{1656766643140} is an apocalyptic number.

1656766643140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1656766643140 is an abundant number, since it is smaller than the sum of its proper divisors (2369805478460).

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

1656766643140 is a wasteful number, since it uses less digits than its factorization.

1656766643140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149798164 (or 149798162 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 55.

The spelling of 1656766643140 in words is "one trillion, six hundred fifty-six billion, seven hundred sixty-six million, six hundred forty-three thousand, one hundred forty".