1081694036640 has 96 divisors (see below), whose sum is σ = 3894098544000. Its totient is φ = 247244350464.

The previous prime is 1081694036627. The next prime is 1081694036641. The reversal of 1081694036640 is 466304961801.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1081694036640.

It is not an unprimeable number, because it can be changed into a prime (1081694036641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160963015 + ... + 160969734.

It is an arithmetic number, because the mean of its divisors is an integer number (40563526500).

Almost surely, 2^{1081694036640} is an apocalyptic number.

1081694036640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1081694036640 is an abundant number, since it is smaller than the sum of its proper divisors (2812404507360).

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

1081694036640 is a wasteful number, since it uses less digits than its factorization.

1081694036640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321932774 (or 321932766 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 48.

The spelling of 1081694036640 in words is "one trillion, eighty-one billion, six hundred ninety-four million, thirty-six thousand, six hundred forty".