1217012073640 has 64 divisors (see below), whose sum is σ = 2987325360000. Its totient is φ = 442532970240.

The previous prime is 1217012073581. The next prime is 1217012073691. The reversal of 1217012073640 is 463702107121.

It is a super-2 number, since 2×1217012073640² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1217012073596 and 1217012073605.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21474061 + ... + 21530659.

It is an arithmetic number, because the mean of its divisors is an integer number (46676958750).

Almost surely, 2^{1217012073640} is an apocalyptic number.

1217012073640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1217012073640 is an abundant number, since it is smaller than the sum of its proper divisors (1770313286360).

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

1217012073640 is a wasteful number, since it uses less digits than its factorization.

1217012073640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105490 (or 105486 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 34.

The spelling of 1217012073640 in words is "one trillion, two hundred seventeen billion, twelve million, seventy-three thousand, six hundred forty".