6542346978 has 12 divisors (see below), whose sum is σ = 14175085158. Its totient is φ = 2180782320.

The previous prime is 6542346973. The next prime is 6542347027. The reversal of 6542346978 is 8796432456.

6542346978 is a `hidden beast` number, since 6 + 542 + 3 + 4 + 6 + 97 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4320827289 + 2221519689 = 65733^2 + 47133^2 .

It is not an unprimeable number, because it can be changed into a prime (6542346973) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 181731843 + ... + 181731878.

Almost surely, 2^6542346978 is an apocalyptic number.

6542346978 is an abundant number, since it is smaller than the sum of its proper divisors (7632738180).

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

6542346978 is a wasteful number, since it uses less digits than its factorization.

6542346978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363463729 (or 363463726 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 54.

The square root of 6542346978 is about 80884.7759346591. The cubic root of 6542346978 is about 1870.2996439009.

The spelling of 6542346978 in words is "six billion, five hundred forty-two million, three hundred forty-six thousand, nine hundred seventy-eight".