215650451016 has 1536 divisors, whose sum is σ = 877670277120. Its totient is φ = 45984153600.

The previous prime is 215650450957. The next prime is 215650451057. The reversal of 215650451016 is 610154056512.

215650451016 is a `hidden beast` number, since 2 + 156 + 50 + 451 + 0 + 1 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 3037330261 + ... + 3037330331.

It is an arithmetic number, because the mean of its divisors is an integer number (571399920).

Almost surely, 2^215650451016 is an apocalyptic number.

215650451016 is a gapful number since it is divisible by the number (26) 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 215650451016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (438835138560).

215650451016 is an abundant number, since it is smaller than the sum of its proper divisors (662019826104).

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

215650451016 is a wasteful number, since it uses less digits than its factorization.

215650451016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235 (or 228 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

It can be divided in two parts, 215650 and 451016, that added together give a palindrome (666666).

The spelling of 215650451016 in words is "two hundred fifteen billion, six hundred fifty million, four hundred fifty-one thousand, sixteen".