1618078412544 has 432 divisors, whose sum is σ = 5098882209792. Its totient is φ = 453860352000.

The previous prime is 1618078412497. The next prime is 1618078412563. The reversal of 1618078412544 is 4452148708161.

It is a happy number.

It is a super-2 number, since 2×1618078412544² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 66245454 + ... + 66269874.

Almost surely, 2^{1618078412544} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1618078412544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2549441104896).

1618078412544 is an abundant number, since it is smaller than the sum of its proper divisors (3480803797248).

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

1618078412544 is a wasteful number, since it uses less digits than its factorization.

1618078412544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24516 (or 24491 counting only the distinct ones).

The product of its (nonzero) digits is 1720320, while the sum is 51.

The spelling of 1618078412544 in words is "one trillion, six hundred eighteen billion, seventy-eight million, four hundred twelve thousand, five hundred forty-four".