1642015543212 has 288 divisors, whose sum is σ = 4719117312000. Its totient is φ = 476846092800.

The previous prime is 1642015543211. The next prime is 1642015543219. The reversal of 1642015543212 is 2123455102461.

1642015543212 is a `hidden beast` number, since 1 + 6 + 4 + 201 + 5 + 5 + 432 + 12 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (1642015543211) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1510593333 + ... + 1510594419.

It is an arithmetic number, because the mean of its divisors is an integer number (16385824000).

Almost surely, 2^{1642015543212} is an apocalyptic number.

1642015543212 is a gapful number since it is divisible by the number (12) 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 1642015543212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2359558656000).

1642015543212 is an abundant number, since it is smaller than the sum of its proper divisors (3077101768788).

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

1642015543212 is a wasteful number, since it uses less digits than its factorization.

1642015543212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1997 (or 1992 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 1642015543212 in words is "one trillion, six hundred forty-two billion, fifteen million, five hundred forty-three thousand, two hundred twelve".