360021801816 has 128 divisors (see below), whose sum is σ = 1087506648000. Its totient is φ = 109895325696.

The previous prime is 360021801803. The next prime is 360021801823. The reversal of 360021801816 is 618108120063.

360021801816 is a `hidden beast` number, since 3 + 600 + 21 + 8 + 0 + 18 + 16 = 666.

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

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, 1189071 + ... + 1460798.

Almost surely, 2^360021801816 is an apocalyptic number.

360021801816 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

360021801816 is an abundant number, since it is smaller than the sum of its proper divisors (727484846184).

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

360021801816 is a wasteful number, since it uses less digits than its factorization.

360021801816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2649938 (or 2649928 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

Adding to 360021801816 its reverse (618108120063), we get a palindrome (978129921879).

The spelling of 360021801816 in words is "three hundred sixty billion, twenty-one million, eight hundred one thousand, eight hundred sixteen".