61383881 has 8 divisors (see below), whose sum is σ = 66253824. Its totient is φ = 56535120.

The previous prime is 61383863. The next prime is 61383893. The reversal of 61383881 is 18838316.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61383881 - 2¹⁰ = 61382857 is a prime.

It is a super-2 number, since 2×61383881² = 7535961693244322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61383841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1016 + ... + 11126.

It is an arithmetic number, because the mean of its divisors is an integer number (8281728).

Almost surely, 2^61383881 is an apocalyptic number.

It is an amenable number.

61383881 is a deficient number, since it is larger than the sum of its proper divisors (4869943).

61383881 is a wasteful number, since it uses less digits than its factorization.

61383881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10591.

The product of its digits is 27648, while the sum is 38.

The square root of 61383881 is about 7834.7865956898. The cubic root of 61383881 is about 394.4737552304.

The spelling of 61383881 in words is "sixty-one million, three hundred eighty-three thousand, eight hundred eighty-one".