1620747336960 has 864 divisors, whose sum is σ = 6204593461248. Its totient is φ = 389186519040.

The previous prime is 1620747336959. The next prime is 1620747337007. The reversal of 1620747336960 is 696337470261.

It is a happy number.

1620747336960 is a `hidden beast` number, since 1 + 6 + 207 + 4 + 73 + 369 + 6 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1620747336897 and 1620747336906.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 303906454 + ... + 303911786.

It is an arithmetic number, because the mean of its divisors is an integer number (7181242432).

Almost surely, 2^{1620747336960} is an apocalyptic number.

1620747336960 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 1620747336960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3102296730624).

1620747336960 is an abundant number, since it is smaller than the sum of its proper divisors (4583846124288).

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

1620747336960 is a wasteful number, since it uses less digits than its factorization.

1620747336960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5451 (or 5434 counting only the distinct ones).

The product of its (nonzero) digits is 6858432, while the sum is 54.

The spelling of 1620747336960 in words is "one trillion, six hundred twenty billion, seven hundred forty-seven million, three hundred thirty-six thousand, nine hundred sixty".