1929213158401 has 16 divisors (see below), whose sum is σ = 2050573107600. Its totient is φ = 1811552940288.

The previous prime is 1929213158377. The next prime is 1929213158413. The reversal of 1929213158401 is 1048513129291.

It can be written as a sum of positive squares in 8 ways, for example, as 284152963600 + 1645060194801 = 533060^2 + 1282599^2 .

It is a cyclic number.

It is not a de Polignac number, because 1929213158401 - 2⁷ = 1929213158273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1929213153401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2068335 + ... + 2852443.

It is an arithmetic number, because the mean of its divisors is an integer number (128160819225).

Almost surely, 2^{1929213158401} is an apocalyptic number.

It is an amenable number.

1929213158401 is a deficient number, since it is larger than the sum of its proper divisors (121359949199).

1929213158401 is a wasteful number, since it uses less digits than its factorization.

1929213158401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 786468.

The product of its (nonzero) digits is 155520, while the sum is 46.

The spelling of 1929213158401 in words is "one trillion, nine hundred twenty-nine billion, two hundred thirteen million, one hundred fifty-eight thousand, four hundred one".