1216526038020 has 72 divisors (see below), whose sum is σ = 3809165418240. Its totient is φ = 313942201920.

The previous prime is 1216526037997. The next prime is 1216526038037. The reversal of 1216526038020 is 208306256121.

1216526038020 is a `hidden beast` number, since 1 + 2 + 16 + 5 + 260 + 380 + 2 + 0 = 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 23 ways as a sum of consecutive naturals, for example, 109002130 + ... + 109013289.

Almost surely, 2^{1216526038020} is an apocalyptic number.

1216526038020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1216526038020 is an abundant number, since it is smaller than the sum of its proper divisors (2592639380220).

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

1216526038020 is a wasteful number, since it uses less digits than its factorization.

1216526038020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218015465 (or 218015460 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 1216526038020 in words is "one trillion, two hundred sixteen billion, five hundred twenty-six million, thirty-eight thousand, twenty".