61506755 has 4 divisors (see below), whose sum is σ = 73808112. Its totient is φ = 49205400.

The previous prime is 61506719. The next prime is 61506811. The reversal of 61506755 is 55760516.

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

It is not a de Polignac number, because 61506755 - 2¹² = 61502659 is a prime.

It is a Duffinian 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, 6150671 + ... + 6150680.

It is an arithmetic number, because the mean of its divisors is an integer number (18452028).

Almost surely, 2^61506755 is an apocalyptic number.

61506755 is a deficient number, since it is larger than the sum of its proper divisors (12301357).

61506755 is a wasteful number, since it uses less digits than its factorization.

61506755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12301356.

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 61506755 is about 7842.6242419231. The cubic root of 61506755 is about 394.7367898776.

The spelling of 61506755 in words is "sixty-one million, five hundred six thousand, seven hundred fifty-five".