1620244877040 has 320 divisors, whose sum is σ = 5876491737600. Its totient is φ = 409191284736.

The previous prime is 1620244877039. The next prime is 1620244877101. The reversal of 1620244877040 is 407784420261.

1620244877040 is a `hidden beast` number, since 1 + 62 + 0 + 2 + 4 + 487 + 70 + 40 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 204908767 + ... + 204916673.

It is an arithmetic number, because the mean of its divisors is an integer number (18364036680).

Almost surely, 2^{1620244877040} is an apocalyptic number.

1620244877040 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 1620244877040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2938245868800).

1620244877040 is an abundant number, since it is smaller than the sum of its proper divisors (4256246860560).

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

1620244877040 is a wasteful number, since it uses less digits than its factorization.

1620244877040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12941 (or 12929 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 45.

The spelling of 1620244877040 in words is "one trillion, six hundred twenty billion, two hundred forty-four million, eight hundred seventy-seven thousand, forty".