1423747717680 has 160 divisors (see below), whose sum is σ = 4474288627200. Its totient is φ = 374462433280.

The previous prime is 1423747717633. The next prime is 1423747717687. The reversal of 1423747717680 is 867177473241.

It is a Cunningham number, because it is equal to 1193209²-1.

It is a self number, because there is not a number n which added to its sum of digits gives 1423747717680.

It is not an unprimeable number, because it can be changed into a prime (1423747717687) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11872420 + ... + 11991740.

It is an arithmetic number, because the mean of its divisors is an integer number (27964303920).

Almost surely, 2^{1423747717680} is an apocalyptic number.

1423747717680 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 1423747717680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2237144313600).

1423747717680 is an abundant number, since it is smaller than the sum of its proper divisors (3050540909520).

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

1423747717680 is a wasteful number, since it uses less digits than its factorization.

1423747717680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120019 (or 120013 counting only the distinct ones).

The product of its (nonzero) digits is 11063808, while the sum is 57.

The spelling of 1423747717680 in words is "one trillion, four hundred twenty-three billion, seven hundred forty-seven million, seven hundred seventeen thousand, six hundred eighty".