16155491264640 has 3840 divisors, whose sum is σ = 76585170816000. Its totient is φ = 3210307043328.

The previous prime is 16155491264599. The next prime is 16155491264699. The reversal of 16155491264640 is 4646219455161.

16155491264640 is a `hidden beast` number, since 1 + 6 + 1 + 5 + 54 + 9 + 126 + 464 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 479 ways as a sum of consecutive naturals, for example, 67596197641 + ... + 67596197879.

It is an arithmetic number, because the mean of its divisors is an integer number (19944054900).

Almost surely, 2^{16155491264640} is an apocalyptic number.

16155491264640 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 16155491264640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38292585408000).

16155491264640 is an abundant number, since it is smaller than the sum of its proper divisors (60429679551360).

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

16155491264640 is a wasteful number, since it uses less digits than its factorization.

16155491264640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409 (or 381 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 54.

The spelling of 16155491264640 in words is "sixteen trillion, one hundred fifty-five billion, four hundred ninety-one million, two hundred sixty-four thousand, six hundred forty".