16425676801021 has 4 divisors (see below), whose sum is σ = 17391893083452. Its totient is φ = 15459460518592.

The previous prime is 16425676801007. The next prime is 16425676801049. The reversal of 16425676801021 is 12010867652461.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14388745562500 + 2036931238521 = 3793250^2 + 1427211^2 .

It is a cyclic number.

It is not a de Polignac number, because 16425676801021 - 2¹⁵ = 16425676768253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16425676901021) 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, 483108141190 + ... + 483108141223.

It is an arithmetic number, because the mean of its divisors is an integer number (4347973270863).

Almost surely, 2^{16425676801021} is an apocalyptic number.

It is an amenable number.

16425676801021 is a deficient number, since it is larger than the sum of its proper divisors (966216282431).

16425676801021 is an equidigital number, since it uses as much as digits as its factorization.

16425676801021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966216282430.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 16425676801021 in words is "sixteen trillion, four hundred twenty-five billion, six hundred seventy-six million, eight hundred one thousand, twenty-one".