61327555 has 4 divisors (see below), whose sum is σ = 73593072. Its totient is φ = 49062040.

The previous prime is 61327529. The next prime is 61327559. The reversal of 61327555 is 55572316.

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

It is not a de Polignac number, because 61327555 - 2¹¹ = 61325507 is a prime.

It is a super-2 number, since 2×61327555² = 7522138004556050, which contains 22 as substring.

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 61327555.

It is not an unprimeable number, because it can be changed into a prime (61327559) 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, 6132751 + ... + 6132760.

It is an arithmetic number, because the mean of its divisors is an integer number (18398268).

Almost surely, 2^61327555 is an apocalyptic number.

61327555 is a deficient number, since it is larger than the sum of its proper divisors (12265517).

61327555 is a wasteful number, since it uses less digits than its factorization.

61327555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12265516.

The product of its digits is 31500, while the sum is 34.

The square root of 61327555 is about 7831.1911609920. The cubic root of 61327555 is about 394.3530616110.

The spelling of 61327555 in words is "sixty-one million, three hundred twenty-seven thousand, five hundred fifty-five".