61912559 has 4 divisors (see below), whose sum is σ = 61950216. Its totient is φ = 61874904.

The previous prime is 61912531. The next prime is 61912597. The reversal of 61912559 is 95521916.

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 61912559 - 2¹² = 61908463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61911559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16244 + ... + 19689.

It is an arithmetic number, because the mean of its divisors is an integer number (15487554).

Almost surely, 2^61912559 is an apocalyptic number.

61912559 is a deficient number, since it is larger than the sum of its proper divisors (37657).

61912559 is a wasteful number, since it uses less digits than its factorization.

61912559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37656.

The product of its digits is 24300, while the sum is 38.

The square root of 61912559 is about 7868.4534058479. The cubic root of 61912559 is about 395.6030078361.

The spelling of 61912559 in words is "sixty-one million, nine hundred twelve thousand, five hundred fifty-nine".