68557356 has 36 divisors (see below), whose sum is σ = 198055312. Its totient is φ = 19587744.

The previous prime is 68557343. The next prime is 68557367. The reversal of 68557356 is 65375586.

68557356 = T₂₂₄₀ + T₂₂₄₁ + ... + T₂₂₆₆.

68557356 is a `hidden beast` number, since 68 + 557 + 35 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×68557356² = 9400222123421472, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135775 + ... + 136278.

Almost surely, 2^68557356 is an apocalyptic number.

It is an amenable number.

68557356 is an abundant number, since it is smaller than the sum of its proper divisors (129497956).

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

68557356 is a wasteful number, since it uses less digits than its factorization.

68557356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272070 (or 272065 counting only the distinct ones).

The product of its digits is 756000, while the sum is 45.

The square root of 68557356 is about 8279.9369562817. The cubic root of 68557356 is about 409.2776414050.

The spelling of 68557356 in words is "sixty-eight million, five hundred fifty-seven thousand, three hundred fifty-six".