1641489780480 has 144 divisors (see below), whose sum is σ = 5719099768704. Its totient is φ = 397936906240.

The previous prime is 1641489780473. The next prime is 1641489780503. The reversal of 1641489780480 is 840879841461.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19388274 + ... + 19472753.

It is an arithmetic number, because the mean of its divisors is an integer number (39715970616).

Almost surely, 2^{1641489780480} is an apocalyptic number.

1641489780480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1641489780480 is an abundant number, since it is smaller than the sum of its proper divisors (4077609988224).

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

1641489780480 is a wasteful number, since it uses less digits than its factorization.

1641489780480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38861062 (or 38861048 counting only the distinct ones).

The product of its (nonzero) digits is 12386304, while the sum is 60.

The spelling of 1641489780480 in words is "one trillion, six hundred forty-one billion, four hundred eighty-nine million, seven hundred eighty thousand, four hundred eighty".