1217315914961 has 8 divisors (see below), whose sum is σ = 1217889735744. Its totient is φ = 1216742189040.

The previous prime is 1217315914957. The next prime is 1217315914973. The reversal of 1217315914961 is 1694195137121.

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 1217315914961 - 2² = 1217315914957 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1217315910961) 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, 41644331 + ... + 41673551.

It is an arithmetic number, because the mean of its divisors is an integer number (152236216968).

Almost surely, 2^{1217315914961} is an apocalyptic number.

It is an amenable number.

1217315914961 is a deficient number, since it is larger than the sum of its proper divisors (573820783).

1217315914961 is a wasteful number, since it uses less digits than its factorization.

1217315914961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47431.

The product of its digits is 408240, while the sum is 50.

The spelling of 1217315914961 in words is "one trillion, two hundred seventeen billion, three hundred fifteen million, nine hundred fourteen thousand, nine hundred sixty-one".