1163451402640 has 40 divisors (see below), whose sum is σ = 2710943687160. Its totient is φ = 464362208256.

The previous prime is 1163451402637. The next prime is 1163451402643. The reversal of 1163451402640 is 462041543611.

It is an interprime number because it is at equal distance from previous prime (1163451402637) and next prime (1163451402643).

It can be written as a sum of positive squares in 4 ways, for example, as 605209314304 + 558242088336 = 777952^2 + 747156^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 1163451402640.

It is not an unprimeable number, because it can be changed into a prime (1163451402643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15874975 + ... + 15948094.

It is an arithmetic number, because the mean of its divisors is an integer number (67773592179).

Almost surely, 2^{1163451402640} is an apocalyptic number.

1163451402640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1163451402640 is an abundant number, since it is smaller than the sum of its proper divisors (1547492284520).

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

1163451402640 is a wasteful number, since it uses less digits than its factorization.

1163451402640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31823539 (or 31823533 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 1163451402640 in words is "one trillion, one hundred sixty-three billion, four hundred fifty-one million, four hundred two thousand, six hundred forty".