61820868 has 12 divisors (see below), whose sum is σ = 144248720. Its totient is φ = 20606952.

The previous prime is 61820861. The next prime is 61820881. The reversal of 61820868 is 86802816.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (61820861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2575858 + ... + 2575881.

Almost surely, 2^61820868 is an apocalyptic number.

It is an amenable number.

61820868 is an abundant number, since it is smaller than the sum of its proper divisors (82427852).

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

61820868 is a wasteful number, since it uses less digits than its factorization.

61820868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5151746 (or 5151744 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 61820868 is about 7862.6247525874. The cubic root of 61820868 is about 395.4076185251.

The spelling of 61820868 in words is "sixty-one million, eight hundred twenty thousand, eight hundred sixty-eight".