1001403537552 has 120 divisors (see below), whose sum is σ = 3102947246880. Its totient is φ = 298926397440.

The previous prime is 1001403537499. The next prime is 1001403537553. The reversal of 1001403537552 is 2557353041001.

1001403537552 is a `hidden beast` number, since 1 + 0 + 0 + 1 + 40 + 35 + 37 + 552 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1001403537553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4611777 + ... + 4824032.

It is an arithmetic number, because the mean of its divisors is an integer number (25857893724).

Almost surely, 2^{1001403537552} is an apocalyptic number.

1001403537552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1001403537552 is an abundant number, since it is smaller than the sum of its proper divisors (2101543709328).

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

1001403537552 is a wasteful number, since it uses less digits than its factorization.

1001403537552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9435901 (or 9435892 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 36.

Adding to 1001403537552 its reverse (2557353041001), we get a palindrome (3558756578553).

The spelling of 1001403537552 in words is "one trillion, one billion, four hundred three million, five hundred thirty-seven thousand, five hundred fifty-two".