213655545350640 has 160 divisors (see below), whose sum is σ = 779214342000960. Its totient is φ = 53623352549376.

The previous prime is 213655545350627. The next prime is 213655545350669. The reversal of 213655545350640 is 46053545556312.

213655545350640 is a `hidden beast` number, since 2 + 1 + 3 + 6 + 5 + 5 + 545 + 3 + 50 + 6 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2909216349 + ... + 2909289788.

It is an arithmetic number, because the mean of its divisors is an integer number (4870089637506).

Almost surely, 2^{213655545350640} is an apocalyptic number.

213655545350640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213655545350640 is an abundant number, since it is smaller than the sum of its proper divisors (565558796650320).

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

213655545350640 is a wasteful number, since it uses less digits than its factorization.

213655545350640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5818506176 (or 5818506164 counting only the distinct ones).

The product of its (nonzero) digits is 32400000, while the sum is 54.

The spelling of 213655545350640 in words is "two hundred thirteen trillion, six hundred fifty-five billion, five hundred forty-five million, three hundred fifty thousand, six hundred forty".