61056507 has 4 divisors (see below), whose sum is σ = 81408680. Its totient is φ = 40704336.

The previous prime is 61056491. The next prime is 61056509. The reversal of 61056507 is 70565016.

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

It is not a de Polignac number, because 61056507 - 2⁴ = 61056491 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61056509) 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, 10176082 + ... + 10176087.

It is an arithmetic number, because the mean of its divisors is an integer number (20352170).

Almost surely, 2^61056507 is an apocalyptic number.

61056507 is a deficient number, since it is larger than the sum of its proper divisors (20352173).

61056507 is a wasteful number, since it uses less digits than its factorization.

61056507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20352172.

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 61056507 is about 7813.8663285214. The cubic root of 61056507 is about 393.7712325159.

The spelling of 61056507 in words is "sixty-one million, fifty-six thousand, five hundred seven".