61687215675271 has 8 divisors (see below), whose sum is σ = 62159690729088. Its totient is φ = 61215582075000.

The previous prime is 61687215675259. The next prime is 61687215675287. The reversal of 61687215675271 is 17257651278616.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61687215675271 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 (61687215675871) 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, 210216205 + ... + 210509446.

It is an arithmetic number, because the mean of its divisors is an integer number (7769961341136).

Almost surely, 2^{61687215675271} is an apocalyptic number.

61687215675271 is a deficient number, since it is larger than the sum of its proper divisors (472475053817).

61687215675271 is a wasteful number, since it uses less digits than its factorization.

61687215675271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420726773.

The product of its digits is 59270400, while the sum is 64.

The spelling of 61687215675271 in words is "sixty-one trillion, six hundred eighty-seven billion, two hundred fifteen million, six hundred seventy-five thousand, two hundred seventy-one".