61542577 has 8 divisors (see below), whose sum is σ = 65670560. Its totient is φ = 57503520.

The previous prime is 61542563. The next prime is 61542619. The reversal of 61542577 is 77524516.

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 61542577 - 2⁷ = 61542449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61542557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20799 + ... + 23572.

It is an arithmetic number, because the mean of its divisors is an integer number (8208820).

Almost surely, 2^61542577 is an apocalyptic number.

It is an amenable number.

61542577 is a deficient number, since it is larger than the sum of its proper divisors (4127983).

61542577 is a wasteful number, since it uses less digits than its factorization.

61542577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44463.

The product of its digits is 58800, while the sum is 37.

The square root of 61542577 is about 7844.9077113756. The cubic root of 61542577 is about 394.8134075707.

The spelling of 61542577 in words is "sixty-one million, five hundred forty-two thousand, five hundred seventy-seven".