1601385026640 has 320 divisors, whose sum is σ = 5718628270080. Its totient is φ = 363129661440.

The previous prime is 1601385026627. The next prime is 1601385026653. The reversal of 1601385026640 is 466205831061.

It is an interprime number because it is at equal distance from previous prime (1601385026627) and next prime (1601385026653).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 1601385026592 and 1601385026601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 108804562 + ... + 108819278.

It is an arithmetic number, because the mean of its divisors is an integer number (17870713344).

Almost surely, 2^{1601385026640} is an apocalyptic number.

1601385026640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1601385026640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2859314135040).

1601385026640 is an abundant number, since it is smaller than the sum of its proper divisors (4117243243440).

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

1601385026640 is a wasteful number, since it uses less digits than its factorization.

1601385026640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15250 (or 15244 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 1601385026640 in words is "one trillion, six hundred one billion, three hundred eighty-five million, twenty-six thousand, six hundred forty".