1930328356861 has 4 divisors (see below), whose sum is σ = 1937668008672. Its totient is φ = 1922988705052.

The previous prime is 1930328356787. The next prime is 1930328356907. The reversal of 1930328356861 is 1686538230391.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1930328356861 - 2²⁹ = 1929791485949 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 (1930328356361) 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, 3669825511 + ... + 3669826036.

It is an arithmetic number, because the mean of its divisors is an integer number (484417002168).

Almost surely, 2^{1930328356861} is an apocalyptic number.

It is an amenable number.

1930328356861 is a deficient number, since it is larger than the sum of its proper divisors (7339651811).

1930328356861 is an equidigital number, since it uses as much as digits as its factorization.

1930328356861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7339651810.

The product of its (nonzero) digits is 5598720, while the sum is 55.

The spelling of 1930328356861 in words is "one trillion, nine hundred thirty billion, three hundred twenty-eight million, three hundred fifty-six thousand, eight hundred sixty-one".