1778900970660 has 48 divisors (see below), whose sum is σ = 5433733876032. Its totient is φ = 431248720000.

The previous prime is 1778900970659. The next prime is 1778900970677. The reversal of 1778900970660 is 660790098771.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1778900970594 and 1778900970603.

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, 1347651591 + ... + 1347652910.

It is an arithmetic number, because the mean of its divisors is an integer number (113202789084).

Almost surely, 2^{1778900970660} is an apocalyptic number.

1778900970660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1778900970660 is an abundant number, since it is smaller than the sum of its proper divisors (3654832905372).

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

1778900970660 is a wasteful number, since it uses less digits than its factorization.

1778900970660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2695304524 (or 2695304522 counting only the distinct ones).

The product of its (nonzero) digits is 8001504, while the sum is 60.

The spelling of 1778900970660 in words is "one trillion, seven hundred seventy-eight billion, nine hundred million, nine hundred seventy thousand, six hundred sixty".