215461326780 has 480 divisors, whose sum is σ = 804845690880. Its totient is φ = 47214005760.

The previous prime is 215461326739. The next prime is 215461326841. The reversal of 215461326780 is 87623164512.

215461326780 is a `hidden beast` number, since 2 + 1 + 5 + 4 + 613 + 26 + 7 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 38315049 + ... + 38320671.

It is an arithmetic number, because the mean of its divisors is an integer number (1676761856).

Almost surely, 2^215461326780 is an apocalyptic number.

215461326780 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 215461326780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (402422845440).

215461326780 is an abundant number, since it is smaller than the sum of its proper divisors (589384364100).

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

215461326780 is a wasteful number, since it uses less digits than its factorization.

215461326780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5791 (or 5780 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 215461326780 in words is "two hundred fifteen billion, four hundred sixty-one million, three hundred twenty-six thousand, seven hundred eighty".