61553707 has 4 divisors (see below), whose sum is σ = 61818120. Its totient is φ = 61289296.

The previous prime is 61553677. The next prime is 61553741. The reversal of 61553707 is 70735516.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61553707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61553777) 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, 131857 + ... + 132322.

It is an arithmetic number, because the mean of its divisors is an integer number (15454530).

Almost surely, 2^61553707 is an apocalyptic number.

61553707 is a deficient number, since it is larger than the sum of its proper divisors (264413).

61553707 is a wasteful number, since it uses less digits than its factorization.

61553707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264412.

The product of its (nonzero) digits is 22050, while the sum is 34.

The square root of 61553707 is about 7845.6170566757. The cubic root of 61553707 is about 394.8372068577.

The spelling of 61553707 in words is "sixty-one million, five hundred fifty-three thousand, seven hundred seven".