162651491 has 2 divisors, whose sum is σ = 162651492. Its totient is φ = 162651490.

The previous prime is 162651481. The next prime is 162651493. The reversal of 162651491 is 194156261.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 162651491 - 2¹⁸ = 162389347 is a prime.

Together with 162651493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (162651493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81325745 + 81325746.

It is an arithmetic number, because the mean of its divisors is an integer number (81325746).

Almost surely, 2^162651491 is an apocalyptic number.

162651491 is a deficient number, since it is larger than the sum of its proper divisors (1).

162651491 is an equidigital number, since it uses as much as digits as its factorization.

162651491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 35.

The square root of 162651491 is about 12753.4893656599. The cubic root of 162651491 is about 545.8659644511.

The spelling of 162651491 in words is "one hundred sixty-two million, six hundred fifty-one thousand, four hundred ninety-one".