61551567610501 has 8 divisors (see below), whose sum is σ = 62391004277400. Its totient is φ = 60715416410880.

The previous prime is 61551567610483. The next prime is 61551567610541. The reversal of 61551567610501 is 10501676515516.

It can be written as a sum of positive squares in 4 ways, for example, as 80103150625 + 61471464459876 = 283025^2 + 7840374^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61551567610501 - 2²⁵ = 61551534056069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61551567610541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 821329096 + ... + 821404033.

It is an arithmetic number, because the mean of its divisors is an integer number (7798875534675).

Almost surely, 2^{61551567610501} is an apocalyptic number.

It is an amenable number.

61551567610501 is a deficient number, since it is larger than the sum of its proper divisors (839436666899).

61551567610501 is a wasteful number, since it uses less digits than its factorization.

61551567610501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642733639.

The product of its (nonzero) digits is 945000, while the sum is 49.

The spelling of 61551567610501 in words is "sixty-one trillion, five hundred fifty-one billion, five hundred sixty-seven million, six hundred ten thousand, five hundred one".