162578637648 has 160 divisors (see below), whose sum is σ = 542070424320. Its totient is φ = 45689495040.

The previous prime is 162578637647. The next prime is 162578637649. The reversal of 162578637648 is 846736875261.

162578637648 is a `hidden beast` number, since 1 + 6 + 257 + 8 + 6 + 376 + 4 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (162578637647) and next prime (162578637649).

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162578637647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 256215 + ... + 625142.

It is an arithmetic number, because the mean of its divisors is an integer number (3387940152).

Almost surely, 2^162578637648 is an apocalyptic number.

162578637648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

162578637648 is an abundant number, since it is smaller than the sum of its proper divisors (379491786672).

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

162578637648 is a wasteful number, since it uses less digits than its factorization.

162578637648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881442 (or 881430 counting only the distinct ones).

The product of its digits is 81285120, while the sum is 63.

The spelling of 162578637648 in words is "one hundred sixty-two billion, five hundred seventy-eight million, six hundred thirty-seven thousand, six hundred forty-eight".