1223971015680 has 1584 divisors, whose sum is σ = 5421697890336. Its totient is φ = 263085096960.

The previous prime is 1223971015667. The next prime is 1223971015741. The reversal of 1223971015680 is 865101793221.

1223971015680 is a `hidden beast` number, since 1 + 22 + 397 + 10 + 156 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1036384690 + ... + 1036385870.

Almost surely, 2^{1223971015680} is an apocalyptic number.

1223971015680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1223971015680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2710848945168).

1223971015680 is an abundant number, since it is smaller than the sum of its proper divisors (4197726874656).

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

1223971015680 is a wasteful number, since it uses less digits than its factorization.

1223971015680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1252 (or 1215 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 1223971015680 in words is "one trillion, two hundred twenty-three billion, nine hundred seventy-one million, fifteen thousand, six hundred eighty".