215673050640 has 160 divisors (see below), whose sum is σ = 671580587520. Its totient is φ = 57255763968.

The previous prime is 215673050633. The next prime is 215673050647. The reversal of 215673050640 is 46050376512.

215673050640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (215673050633) and next prime (215673050647).

It is not an unprimeable number, because it can be changed into a prime (215673050647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84809209 + ... + 84811751.

It is an arithmetic number, because the mean of its divisors is an integer number (4197378672).

Almost surely, 2^215673050640 is an apocalyptic number.

215673050640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215673050640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335790293760).

215673050640 is an abundant number, since it is smaller than the sum of its proper divisors (455907536880).

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

215673050640 is a wasteful number, since it uses less digits than its factorization.

215673050640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4001 (or 3995 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 39.

The spelling of 215673050640 in words is "two hundred fifteen billion, six hundred seventy-three million, fifty thousand, six hundred forty".