9903645537 has 16 divisors (see below), whose sum is σ = 13301529600. Its totient is φ = 6554248272.

The previous prime is 9903645503. The next prime is 9903645593. The reversal of 9903645537 is 7355463099.

It is a happy number.

It is not a de Polignac number, because 9903645537 - 2⁶ = 9903645473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9903645537.

It is not an unprimeable number, because it can be changed into a prime (9903645337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 245748 + ... + 283194.

It is an arithmetic number, because the mean of its divisors is an integer number (831345600).

Almost surely, 2^9903645537 is an apocalyptic number.

It is an amenable number.

9903645537 is a deficient number, since it is larger than the sum of its proper divisors (3397884063).

9903645537 is a wasteful number, since it uses less digits than its factorization.

9903645537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38092.

The product of its (nonzero) digits is 3061800, while the sum is 51.

The square root of 9903645537 is about 99517.0615372058. The cubic root of 9903645537 is about 2147.4926990780.

The spelling of 9903645537 in words is "nine billion, nine hundred three million, six hundred forty-five thousand, five hundred thirty-seven".