1645511904096 has 48 divisors (see below), whose sum is σ = 4573555149744. Its totient is φ = 516239028224.

The previous prime is 1645511904089. The next prime is 1645511904109. The reversal of 1645511904096 is 6904091155461.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a hoax number, since the sum of its digits (51) 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 (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504138045 + ... + 504141308.

It is an arithmetic number, because the mean of its divisors is an integer number (95282398953).

Almost surely, 2^{1645511904096} is an apocalyptic number.

1645511904096 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1645511904096 is an abundant number, since it is smaller than the sum of its proper divisors (2928043245648).

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

1645511904096 is a wasteful number, since it uses less digits than its factorization.

1645511904096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008279383 (or 1008279375 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 51.

The spelling of 1645511904096 in words is "one trillion, six hundred forty-five billion, five hundred eleven million, nine hundred four thousand, ninety-six".