1601271444640 has 96 divisors (see below), whose sum is σ = 4577752537344. Its totient is φ = 516712796160.

The previous prime is 1601271444599. The next prime is 1601271444673. The reversal of 1601271444640 is 464441721061.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 1601271444593 and 1601271444602.

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, 42031156 + ... + 42069235.

It is an arithmetic number, because the mean of its divisors is an integer number (47684922264).

Almost surely, 2^{1601271444640} is an apocalyptic number.

1601271444640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1601271444640 is an abundant number, since it is smaller than the sum of its proper divisors (2976481092704).

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

1601271444640 is a wasteful number, since it uses less digits than its factorization.

1601271444640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84100430 (or 84100422 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

The spelling of 1601271444640 in words is "one trillion, six hundred one billion, two hundred seventy-one million, four hundred forty-four thousand, six hundred forty".