61471213026917 has 4 divisors (see below), whose sum is σ = 63454155382656. Its totient is φ = 59488270671180.

The previous prime is 61471213026913. The next prime is 61471213026953. The reversal of 61471213026917 is 71962031217416.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61471213026917 - 2² = 61471213026913 is a prime.

It is a super-2 number, since 2×61471213026917² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61471213026913) 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, 991471177823 + ... + 991471177884.

It is an arithmetic number, because the mean of its divisors is an integer number (15863538845664).

Almost surely, 2^{61471213026917} is an apocalyptic number.

It is an amenable number.

61471213026917 is a deficient number, since it is larger than the sum of its proper divisors (1982942355739).

61471213026917 is a wasteful number, since it uses less digits than its factorization.

61471213026917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1982942355738.

The product of its (nonzero) digits is 762048, while the sum is 50.

The spelling of 61471213026917 in words is "sixty-one trillion, four hundred seventy-one billion, two hundred thirteen million, twenty-six thousand, nine hundred seventeen".