61642535 has 4 divisors (see below), whose sum is σ = 73971048. Its totient is φ = 49314024.

The previous prime is 61642501. The next prime is 61642541. The reversal of 61642535 is 53524616.

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 61642535 - 2⁸ = 61642279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6164249 + ... + 6164258.

It is an arithmetic number, because the mean of its divisors is an integer number (18492762).

Almost surely, 2^61642535 is an apocalyptic number.

61642535 is a deficient number, since it is larger than the sum of its proper divisors (12328513).

61642535 is a wasteful number, since it uses less digits than its factorization.

61642535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12328512.

The product of its digits is 21600, while the sum is 32.

The square root of 61642535 is about 7851.2760109424. The cubic root of 61642535 is about 395.0270450958.

The spelling of 61642535 in words is "sixty-one million, six hundred forty-two thousand, five hundred thirty-five".