4542216621012 has 54 divisors (see below), whose sum is σ = 13356279831258. Its totient is φ = 1297776176928.

The previous prime is 4542216620987. The next prime is 4542216621067. The reversal of 4542216621012 is 2101266122454.

4542216621012 is a `hidden beast` number, since 4 + 5 + 4 + 2 + 2 + 16 + 621 + 0 + 12 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3514860041616 + 1027356579396 = 1874796^2 + 1013586^2 .

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 17 ways as a sum of consecutive naturals, for example, 1287474603 + ... + 1287478130.

Almost surely, 2^{4542216621012} is an apocalyptic number.

4542216621012 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

4542216621012 is an abundant number, since it is smaller than the sum of its proper divisors (8814063210246).

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

4542216621012 is a wasteful number, since it uses less digits than its factorization.

4542216621012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2574952757 (or 2574952745 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 4542216621012 in words is "four trillion, five hundred forty-two billion, two hundred sixteen million, six hundred twenty-one thousand, twelve".