1217451910164 has 24 divisors (see below), whose sum is σ = 3246538427328. Its totient is φ = 347843402880.

The previous prime is 1217451910127. The next prime is 1217451910177. The reversal of 1217451910164 is 4610191547121.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7246737477 + ... + 7246737644.

It is an arithmetic number, because the mean of its divisors is an integer number (135272434472).

Almost surely, 2^{1217451910164} is an apocalyptic number.

1217451910164 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1217451910164 is an abundant number, since it is smaller than the sum of its proper divisors (2029086517164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1217451910164 is a wasteful number, since it uses less digits than its factorization.

1217451910164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14493475135 (or 14493475133 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 42.

The spelling of 1217451910164 in words is "one trillion, two hundred seventeen billion, four hundred fifty-one million, nine hundred ten thousand, one hundred sixty-four".