61603881 has 8 divisors (see below), whose sum is σ = 82179360. Its totient is φ = 41048832.

The previous prime is 61603879. The next prime is 61603933. The reversal of 61603881 is 18830616.

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

It is not a de Polignac number, because 61603881 - 2¹ = 61603879 is a prime.

It is a super-2 number, since 2×61603881² = 7590076308524322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61603811) 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, 4530 + ... + 11988.

It is an arithmetic number, because the mean of its divisors is an integer number (10272420).

Almost surely, 2^61603881 is an apocalyptic number.

It is an amenable number.

61603881 is a deficient number, since it is larger than the sum of its proper divisors (20575479).

61603881 is a wasteful number, since it uses less digits than its factorization.

61603881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10215.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 61603881 is about 7848.8139868390. The cubic root of 61603881 is about 394.9444583552.

The spelling of 61603881 in words is "sixty-one million, six hundred three thousand, eight hundred eighty-one".