1662542915904 has 280 divisors, whose sum is σ = 5619601626408. Its totient is φ = 481460060160.

The previous prime is 1662542915879. The next prime is 1662542915941. The reversal of 1662542915904 is 4095192452661.

It is a happy number.

1662542915904 is a `hidden beast` number, since 1 + 6 + 6 + 2 + 5 + 42 + 9 + 1 + 590 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 195052955904 + 1467489960000 = 441648^2 + 1211400^2 .

It is a super-2 number, since 2×1662542915904² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 420084 + ... + 1871244.

Almost surely, 2^{1662542915904} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1662542915904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2809800813204).

1662542915904 is an abundant number, since it is smaller than the sum of its proper divisors (3957058710504).

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

1662542915904 is a wasteful number, since it uses less digits than its factorization.

1662542915904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451215 (or 1451196 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 54.

The spelling of 1662542915904 in words is "one trillion, six hundred sixty-two billion, five hundred forty-two million, nine hundred fifteen thousand, nine hundred four".