1618619795520 has 896 divisors, whose sum is σ = 6548826095616. Its totient is φ = 329580969984.

The previous prime is 1618619795461. The next prime is 1618619795581. The reversal of 1618619795520 is 255979168161.

It is a happy number.

It is a super-2 number, since 2×1618619795520² (a number of 25 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

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

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 410502669 + ... + 410506611.

It is an arithmetic number, because the mean of its divisors is an integer number (7308957696).

Almost surely, 2^{1618619795520} is an apocalyptic number.

1618619795520 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 1618619795520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3274413047808).

1618619795520 is an abundant number, since it is smaller than the sum of its proper divisors (4930206300096).

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

1618619795520 is a wasteful number, since it uses less digits than its factorization.

1618619795520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4147 (or 4137 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 60.

The spelling of 1618619795520 in words is "one trillion, six hundred eighteen billion, six hundred nineteen million, seven hundred ninety-five thousand, five hundred twenty".