1642143016755 has 96 divisors (see below), whose sum is σ = 2923917834240. Its totient is φ = 852309976320.

The previous prime is 1642143016711. The next prime is 1642143016757. The reversal of 1642143016755 is 5576103412461.

It is a happy number.

1642143016755 is a `hidden beast` number, since 1 + 6 + 4 + 2 + 1 + 430 + 167 + 55 = 666.

It is not a de Polignac number, because 1642143016755 - 2⁶ = 1642143016691 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1642143016755.

It is not an unprimeable number, because it can be changed into a prime (1642143016757) 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, 133838761 + ... + 133851029.

It is an arithmetic number, because the mean of its divisors is an integer number (30457477440).

Almost surely, 2^{1642143016755} is an apocalyptic number.

1642143016755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1642143016755 is a deficient number, since it is larger than the sum of its proper divisors (1281774817485).

1642143016755 is a wasteful number, since it uses less digits than its factorization.

1642143016755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12881 (or 12878 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The spelling of 1642143016755 in words is "one trillion, six hundred forty-two billion, one hundred forty-three million, sixteen thousand, seven hundred fifty-five".