162946315921 has 2 divisors, whose sum is σ = 162946315922. Its totient is φ = 162946315920.

The previous prime is 162946315859. The next prime is 162946315933. The reversal of 162946315921 is 129513649261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105729675921 + 57216640000 = 325161^2 + 239200^2 .

It is a cyclic number.

It is not a de Polignac number, because 162946315921 - 2¹³ = 162946307729 is a prime.

It is not a weakly prime, because it can be changed into another prime (162946315421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81473157960 + 81473157961.

It is an arithmetic number, because the mean of its divisors is an integer number (81473157961).

Almost surely, 2^162946315921 is an apocalyptic number.

It is an amenable number.

162946315921 is a deficient number, since it is larger than the sum of its proper divisors (1).

162946315921 is an equidigital number, since it uses as much as digits as its factorization.

162946315921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 699840, while the sum is 49.

The spelling of 162946315921 in words is "one hundred sixty-two billion, nine hundred forty-six million, three hundred fifteen thousand, nine hundred twenty-one".