1620016742039 has 4 divisors (see below), whose sum is σ = 1620925334256. Its totient is φ = 1619108149824.

The previous prime is 1620016741991. The next prime is 1620016742059. The reversal of 1620016742039 is 9302476100261.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1620016742039 - 2¹² = 1620016737943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1620016741987 and 1620016742005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620016742059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 454293434 + ... + 454296999.

It is an arithmetic number, because the mean of its divisors is an integer number (405231333564).

Almost surely, 2^{1620016742039} is an apocalyptic number.

1620016742039 is a deficient number, since it is larger than the sum of its proper divisors (908592217).

1620016742039 is an equidigital number, since it uses as much as digits as its factorization.

1620016742039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908592216.

The product of its (nonzero) digits is 108864, while the sum is 41.

The spelling of 1620016742039 in words is "one trillion, six hundred twenty billion, sixteen million, seven hundred forty-two thousand, thirty-nine".