61603555 has 8 divisors (see below), whose sum is σ = 79610832. Its totient is φ = 45491808.

The previous prime is 61603547. The next prime is 61603559. The reversal of 61603555 is 55530616.

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 61603555 - 2³ = 61603547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61603559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 473809 + ... + 473938.

It is an arithmetic number, because the mean of its divisors is an integer number (9951354).

Almost surely, 2^61603555 is an apocalyptic number.

61603555 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

61603555 is a deficient number, since it is larger than the sum of its proper divisors (18007277).

61603555 is a wasteful number, since it uses less digits than its factorization.

61603555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947765.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 61603555 is about 7848.7932193427. The cubic root of 61603555 is about 394.9437616885.

The spelling of 61603555 in words is "sixty-one million, six hundred three thousand, five hundred fifty-five".