2918984720640 has 288 divisors, whose sum is σ = 9687023173632. Its totient is φ = 748293120000.

The previous prime is 2918984720633. The next prime is 2918984720653. The reversal of 2918984720640 is 460274898192.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17893845 + ... + 18056235.

Almost surely, 2^{2918984720640} is an apocalyptic number.

2918984720640 is a gapful number since it is divisible by the number (20) 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 2918984720640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4843511586816).

2918984720640 is an abundant number, since it is smaller than the sum of its proper divisors (6768038452992).

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

2918984720640 is a wasteful number, since it uses less digits than its factorization.

2918984720640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162597 (or 162583 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 60.

The spelling of 2918984720640 in words is "two trillion, nine hundred eighteen billion, nine hundred eighty-four million, seven hundred twenty thousand, six hundred forty".