1620726671020 has 12 divisors (see below), whose sum is σ = 3403526009184. Its totient is φ = 648290668400.

The previous prime is 1620726671009. The next prime is 1620726671021. The reversal of 1620726671020 is 201766270261.

It is not an unprimeable number, because it can be changed into a prime (1620726671021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40518166756 + ... + 40518166795.

It is an arithmetic number, because the mean of its divisors is an integer number (283627167432).

Almost surely, 2^{1620726671020} is an apocalyptic number.

1620726671020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1620726671020 is an abundant number, since it is smaller than the sum of its proper divisors (1782799338164).

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

1620726671020 is a wasteful number, since it uses less digits than its factorization.

1620726671020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81036333560 (or 81036333558 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 40.

The spelling of 1620726671020 in words is "one trillion, six hundred twenty billion, seven hundred twenty-six million, six hundred seventy-one thousand, twenty".