2162497878 has 32 divisors (see below), whose sum is σ = 4837393920. Its totient is φ = 716056200.

The previous prime is 2162497859. The next prime is 2162497879. The reversal of 2162497878 is 8787942612.

It is a happy number.

2162497878 is a `hidden beast` number, since 2 + 1 + 624 + 9 + 7 + 8 + 7 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2162497879) 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 15 ways as a sum of consecutive naturals, for example, 124450 + ... + 140757.

It is an arithmetic number, because the mean of its divisors is an integer number (151168560).

Almost surely, 2^2162497878 is an apocalyptic number.

2162497878 is an abundant number, since it is smaller than the sum of its proper divisors (2674896042).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2162497878 is a wasteful number, since it uses less digits than its factorization.

2162497878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265369 (or 265363 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The square root of 2162497878 is about 46502.6652784547. The cubic root of 2162497878 is about 1293.1589104920.

The spelling of 2162497878 in words is "two billion, one hundred sixty-two million, four hundred ninety-seven thousand, eight hundred seventy-eight".