61577559 has 6 divisors (see below), whose sum is σ = 88945376. Its totient is φ = 41051700.

The previous prime is 61577543. The next prime is 61577561. The reversal of 61577559 is 95577516.

It is a happy number.

It is not a de Polignac number, because 61577559 - 2⁴ = 61577543 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 (61577569) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3420967 + ... + 3420984.

Almost surely, 2^61577559 is an apocalyptic number.

61577559 is a deficient number, since it is larger than the sum of its proper divisors (27367817).

61577559 is a wasteful number, since it uses less digits than its factorization.

61577559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6841957 (or 6841954 counting only the distinct ones).

The product of its digits is 330750, while the sum is 45.

The square root of 61577559 is about 7847.1369938341. The cubic root of 61577559 is about 394.8881999461. Note that the first 3 decimals are identical.

The spelling of 61577559 in words is "sixty-one million, five hundred seventy-seven thousand, five hundred fifty-nine".