1923864412157 has 2 divisors, whose sum is σ = 1923864412158. Its totient is φ = 1923864412156.

The previous prime is 1923864412139. The next prime is 1923864412201. The reversal of 1923864412157 is 7512144683291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1756735525561 + 167128886596 = 1325419^2 + 408814^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1923864412157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1923864412099 and 1923864412108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1923864412117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 961932206078 + 961932206079.

It is an arithmetic number, because the mean of its divisors is an integer number (961932206079).

Almost surely, 2^{1923864412157} is an apocalyptic number.

It is an amenable number.

1923864412157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1923864412157 is an equidigital number, since it uses as much as digits as its factorization.

1923864412157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2903040, while the sum is 53.

The spelling of 1923864412157 in words is "one trillion, nine hundred twenty-three billion, eight hundred sixty-four million, four hundred twelve thousand, one hundred fifty-seven".