61403018 has 4 divisors (see below), whose sum is σ = 92104530. Its totient is φ = 30701508.

The previous prime is 61402967. The next prime is 61403029. The reversal of 61403018 is 81030416.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 42680089 + 18722929 = 6533^2 + 4327^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61402984 and 61403002.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15350753 + ... + 15350756.

Almost surely, 2^61403018 is an apocalyptic number.

61403018 is a deficient number, since it is larger than the sum of its proper divisors (30701512).

61403018 is a wasteful number, since it uses less digits than its factorization.

61403018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30701511.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 61403018 is about 7836.0077845801. The cubic root of 61403018 is about 394.5147446007.

The spelling of 61403018 in words is "sixty-one million, four hundred three thousand, eighteen".