68540157 has 24 divisors (see below), whose sum is σ = 113383296. Its totient is φ = 39083616.

The previous prime is 68540119. The next prime is 68540179. The reversal of 68540157 is 75104586.

68540157 is a `hidden beast` number, since 68 + 540 + 1 + 57 = 666.

It is not a de Polignac number, because 68540157 - 2⁶ = 68540093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68540257) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41848 + ... + 43454.

It is an arithmetic number, because the mean of its divisors is an integer number (4724304).

Almost surely, 2^68540157 is an apocalyptic number.

It is an amenable number.

68540157 is a deficient number, since it is larger than the sum of its proper divisors (44843139).

68540157 is a wasteful number, since it uses less digits than its factorization.

68540157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2297 (or 2294 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 68540157 is about 8278.8982962711. The cubic root of 68540157 is about 409.2434133499.

It can be divided in two parts, 68 and 540157, that added together give a square (540225 = 735²).

The spelling of 68540157 in words is "sixty-eight million, five hundred forty thousand, one hundred fifty-seven".