1620000499969 has 16 divisors (see below), whose sum is σ = 1718176571856. Its totient is φ = 1522145433600.

The previous prime is 1620000499967. The next prime is 1620000499993. The reversal of 1620000499969 is 9699940000261.

It can be written as a sum of positive squares in 8 ways, for example, as 146119744 + 1619854380225 = 12088^2 + 1272735^2 .

It is a cyclic number.

It is not a de Polignac number, because 1620000499969 - 2¹ = 1620000499967 is a prime.

It is a super-2 number, since 2×1620000499969² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1620000499967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125409699 + ... + 125422615.

It is an arithmetic number, because the mean of its divisors is an integer number (107386035741).

Almost surely, 2^{1620000499969} is an apocalyptic number.

It is an amenable number.

1620000499969 is a deficient number, since it is larger than the sum of its proper divisors (98176071887).

1620000499969 is a wasteful number, since it uses less digits than its factorization.

1620000499969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24756.

The product of its (nonzero) digits is 1889568, while the sum is 55.

The spelling of 1620000499969 in words is "one trillion, six hundred twenty billion, four hundred ninety-nine thousand, nine hundred sixty-nine".