61555435 has 4 divisors (see below), whose sum is σ = 73866528. Its totient is φ = 49244344.

The previous prime is 61555433. The next prime is 61555447. The reversal of 61555435 is 53455516.

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

It is a cyclic number.

It is not a de Polignac number, because 61555435 - 2¹ = 61555433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61555435.

It is not an unprimeable number, because it can be changed into a prime (61555433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6155539 + ... + 6155548.

It is an arithmetic number, because the mean of its divisors is an integer number (18466632).

Almost surely, 2^61555435 is an apocalyptic number.

61555435 is a deficient number, since it is larger than the sum of its proper divisors (12311093).

61555435 is a wasteful number, since it uses less digits than its factorization.

61555435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12311092.

The product of its digits is 45000, while the sum is 34.

The square root of 61555435 is about 7845.7271810840. The cubic root of 61555435 is about 394.8409015840.

The spelling of 61555435 in words is "sixty-one million, five hundred fifty-five thousand, four hundred thirty-five".