61568406 has 24 divisors (see below), whose sum is σ = 133740360. Its totient is φ = 20470176.

The previous prime is 61568371. The next prime is 61568443. The reversal of 61568406 is 60486516.

It is a super-3 number, since 3×61568406³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

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, 3181 + ... + 11543.

It is an arithmetic number, because the mean of its divisors is an integer number (5572515).

Almost surely, 2^61568406 is an apocalyptic number.

61568406 is an abundant number, since it is smaller than the sum of its proper divisors (72171954).

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

61568406 is a wasteful number, since it uses less digits than its factorization.

61568406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8780 (or 8777 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 61568406 is about 7846.5537658261. The cubic root of 61568406 is about 394.8686333440.

The spelling of 61568406 in words is "sixty-one million, five hundred sixty-eight thousand, four hundred six".