68153540 has 48 divisors (see below), whose sum is σ = 176155392. Its totient is φ = 21568896.

The previous prime is 68153497. The next prime is 68153549. The reversal of 68153540 is 4535186.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 68153497 and 68153506.

It is not an unprimeable number, because it can be changed into a prime (68153549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16904 + ... + 20543.

It is an arithmetic number, because the mean of its divisors is an integer number (3669904).

Almost surely, 2^68153540 is an apocalyptic number.

It is an amenable number.

68153540 is an abundant number, since it is smaller than the sum of its proper divisors (108001852).

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

68153540 is a wasteful number, since it uses less digits than its factorization.

68153540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37476 (or 37474 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 68153540 is about 8255.5157319213. The cubic root of 68153540 is about 408.4724838355.

The spelling of 68153540 in words is "sixty-eight million, one hundred fifty-three thousand, five hundred forty".