1043661521320 has 64 divisors (see below), whose sum is σ = 2564125683840. Its totient is φ = 379156089600.

The previous prime is 1043661521299. The next prime is 1043661521341. The reversal of 1043661521320 is 231251663401.

1043661521320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1043661521299) and next prime (1043661521341).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 647971 + ... + 1583410.

It is an arithmetic number, because the mean of its divisors is an integer number (40064463810).

Almost surely, 2^{1043661521320} is an apocalyptic number.

1043661521320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1043661521320 is an abundant number, since it is smaller than the sum of its proper divisors (1520464162520).

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

1043661521320 is a wasteful number, since it uses less digits than its factorization.

1043661521320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2232466 (or 2232462 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 1043661521320 in words is "one trillion, forty-three billion, six hundred sixty-one million, five hundred twenty-one thousand, three hundred twenty".