1620438102279 has 24 divisors (see below), whose sum is σ = 2412911526480. Its totient is φ = 1047434308992.

The previous prime is 1620438102211. The next prime is 1620438102281. The reversal of 1620438102279 is 9722018340261.

1620438102279 is a `hidden beast` number, since 1 + 620 + 4 + 3 + 8 + 10 + 2 + 2 + 7 + 9 = 666.

It is not a de Polignac number, because 1620438102279 - 2¹³ = 1620438094087 is a prime.

It is a super-3 number, since 3×1620438102279³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620438102209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20863104 + ... + 20940629.

It is an arithmetic number, because the mean of its divisors is an integer number (100537980270).

Almost surely, 2^{1620438102279} is an apocalyptic number.

1620438102279 is a deficient number, since it is larger than the sum of its proper divisors (792473424201).

1620438102279 is a wasteful number, since it uses less digits than its factorization.

1620438102279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41803871 (or 41803868 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 1620438102279 in words is "one trillion, six hundred twenty billion, four hundred thirty-eight million, one hundred two thousand, two hundred seventy-nine".