162137781 has 40 divisors (see below), whose sum is σ = 269305344. Its totient is φ = 96539040.

The previous prime is 162137779. The next prime is 162137791. The reversal of 162137781 is 187731261.

It is not a de Polignac number, because 162137781 - 2¹ = 162137779 is a prime.

It is a super-2 number, since 2×162137781² = 52577320055207922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162137771) 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 39 ways as a sum of consecutive naturals, for example, 30160 + ... + 35126.

Almost surely, 2^162137781 is an apocalyptic number.

It is an amenable number.

162137781 is a deficient number, since it is larger than the sum of its proper divisors (107167563).

162137781 is a wasteful number, since it uses less digits than its factorization.

162137781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5023 (or 5014 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 162137781 is about 12733.3334598604. Note that the first 3 decimals coincide. The cubic root of 162137781 is about 545.2906801629.

The spelling of 162137781 in words is "one hundred sixty-two million, one hundred thirty-seven thousand, seven hundred eighty-one".