154640108538 has 24 divisors (see below), whose sum is σ = 345861749376. Its totient is φ = 49883905800.

The previous prime is 154640108533. The next prime is 154640108561. The reversal of 154640108538 is 835801046451.

154640108538 is a `hidden beast` number, since 1 + 5 + 4 + 6 + 4 + 0 + 108 + 538 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 154640108493 and 154640108502.

It is not an unprimeable number, because it can be changed into a prime (154640108533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138565848 + ... + 138566963.

It is an arithmetic number, because the mean of its divisors is an integer number (14410906224).

Almost surely, 2^154640108538 is an apocalyptic number.

154640108538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

154640108538 is an abundant number, since it is smaller than the sum of its proper divisors (191221640838).

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

154640108538 is a wasteful number, since it uses less digits than its factorization.

154640108538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277132850 (or 277132847 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

The spelling of 154640108538 in words is "one hundred fifty-four billion, six hundred forty million, one hundred eight thousand, five hundred thirty-eight".