61149955 has 8 divisors (see below), whose sum is σ = 73530000. Its totient is φ = 48819936.

The previous prime is 61149953. The next prime is 61149971. The reversal of 61149955 is 55994116.

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 61149955 - 2¹ = 61149953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61149953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9760 + ... + 14749.

It is an arithmetic number, because the mean of its divisors is an integer number (9191250).

Almost surely, 2^61149955 is an apocalyptic number.

61149955 is a deficient number, since it is larger than the sum of its proper divisors (12380045).

61149955 is a wasteful number, since it uses less digits than its factorization.

61149955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25013.

The product of its digits is 48600, while the sum is 40.

The square root of 61149955 is about 7819.8436685141. The cubic root of 61149955 is about 393.9720212553.

The spelling of 61149955 in words is "sixty-one million, one hundred forty-nine thousand, nine hundred fifty-five".