1641636697536 has 896 divisors, whose sum is σ = 5624306150400. Its totient is φ = 464883793920.

The previous prime is 1641636697523. The next prime is 1641636697579. The reversal of 1641636697536 is 6357966361461.

1641636697536 is a `hidden beast` number, since 1 + 6 + 4 + 1 + 6 + 3 + 6 + 6 + 97 + 536 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2424869230 + ... + 2424869906.

It is an arithmetic number, because the mean of its divisors is an integer number (6277127400).

Almost surely, 2^{1641636697536} is an apocalyptic number.

1641636697536 is a gapful number since it is divisible by the number (16) 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 1641636697536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2812153075200).

1641636697536 is an abundant number, since it is smaller than the sum of its proper divisors (3982669452864).

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

1641636697536 is a wasteful number, since it uses less digits than its factorization.

1641636697536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874 (or 858 counting only the distinct ones).

The product of its digits is 88179840, while the sum is 63.

The spelling of 1641636697536 in words is "one trillion, six hundred forty-one billion, six hundred thirty-six million, six hundred ninety-seven thousand, five hundred thirty-six".