61555110665271 has 8 divisors (see below), whose sum is σ = 86901332703984. Its totient is φ = 38622814535040.

The previous prime is 61555110665227. The next prime is 61555110665273. The reversal of 61555110665271 is 17256601155516.

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

It is not a de Polignac number, because 61555110665271 - 2⁶ = 61555110665207 is a prime.

It is a super-2 number, since 2×61555110665271² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51), and also a Moran number because the ratio is a prime number: 1206962954221 = 61555110665271 / (6 + 1 + 5 + 5 + 5 + 1 + 1 + 0 + 6 + 6 + 5 + 2 + 7 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61555110665273) 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, 603481477060 + ... + 603481477161.

It is an arithmetic number, because the mean of its divisors is an integer number (10862666587998).

Almost surely, 2^{61555110665271} is an apocalyptic number.

61555110665271 is a deficient number, since it is larger than the sum of its proper divisors (25346222038713).

61555110665271 is a wasteful number, since it uses less digits than its factorization.

61555110665271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206962954241.

The product of its (nonzero) digits is 1890000, while the sum is 51.

The spelling of 61555110665271 in words is "sixty-one trillion, five hundred fifty-five billion, one hundred ten million, six hundred sixty-five thousand, two hundred seventy-one".