215083509780 has 48 divisors (see below), whose sum is σ = 603624740544. Its totient is φ = 57223134720.

The previous prime is 215083509769. The next prime is 215083509811. The reversal of 215083509780 is 87905380512.

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, 4113426 + ... + 4165385.

It is an arithmetic number, because the mean of its divisors is an integer number (12575515428).

Almost surely, 2^215083509780 is an apocalyptic number.

215083509780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215083509780 is an abundant number, since it is smaller than the sum of its proper divisors (388541230764).

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

215083509780 is a wasteful number, since it uses less digits than its factorization.

215083509780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8279256 (or 8279254 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 48.

The spelling of 215083509780 in words is "two hundred fifteen billion, eighty-three million, five hundred nine thousand, seven hundred eighty".