61996553 has 4 divisors (see below), whose sum is σ = 62045508. Its totient is φ = 61947600.

The previous prime is 61996541. The next prime is 61996609. The reversal of 61996553 is 35569916.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6091024 + 55905529 = 2468^2 + 7477^2 .

It is a cyclic number.

It is not a de Polignac number, because 61996553 - 2⁴ = 61996537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61996513) 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, 22526 + ... + 25127.

It is an arithmetic number, because the mean of its divisors is an integer number (15511377).

Almost surely, 2^61996553 is an apocalyptic number.

It is an amenable number.

61996553 is a deficient number, since it is larger than the sum of its proper divisors (48955).

61996553 is a wasteful number, since it uses less digits than its factorization.

61996553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48954.

The product of its digits is 218700, while the sum is 44.

The square root of 61996553 is about 7873.7889862505. The cubic root of 61996553 is about 395.7818259652.

The spelling of 61996553 in words is "sixty-one million, nine hundred ninety-six thousand, five hundred fifty-three".