1636873376640 has 1024 divisors, whose sum is σ = 5752995840000. Its totient is φ = 394775986176.

The previous prime is 1636873376629. The next prime is 1636873376651. The reversal of 1636873376640 is 466733786361.

It is an interprime number because it is at equal distance from previous prime (1636873376629) and next prime (1636873376651).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 10985727286 + ... + 10985727434.

It is an arithmetic number, because the mean of its divisors is an integer number (5618160000).

Almost surely, 2^{1636873376640} is an apocalyptic number.

1636873376640 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 1636873376640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2876497920000).

1636873376640 is an abundant number, since it is smaller than the sum of its proper divisors (4116122463360).

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

1636873376640 is a wasteful number, since it uses less digits than its factorization.

1636873376640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 54867456, while the sum is 60.

The spelling of 1636873376640 in words is "one trillion, six hundred thirty-six billion, eight hundred seventy-three million, three hundred seventy-six thousand, six hundred forty".