993525557513 has 4 divisors (see below), whose sum is σ = 993565577748. Its totient is φ = 993485537280.

The previous prime is 993525557483. The next prime is 993525557543. The reversal of 993525557513 is 315755525399.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (993525557483) and next prime (993525557543).

It can be written as a sum of positive squares in 2 ways, for example, as 41131084864 + 952394472649 = 202808^2 + 975907^2 .

It is a cyclic number.

It is not a de Polignac number, because 993525557513 - 2¹² = 993525553417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (993525557543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19972856 + ... + 20022537.

It is an arithmetic number, because the mean of its divisors is an integer number (248391394437).

Almost surely, 2^993525557513 is an apocalyptic number.

It is an amenable number.

993525557513 is a deficient number, since it is larger than the sum of its proper divisors (40020235).

993525557513 is a wasteful number, since it uses less digits than its factorization.

993525557513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40020234.

The product of its digits is 31893750, while the sum is 59.

The spelling of 993525557513 in words is "nine hundred ninety-three billion, five hundred twenty-five million, five hundred fifty-seven thousand, five hundred thirteen".