5398521785 has 8 divisors (see below), whose sum is σ = 6859298376. Its totient is φ = 4064769280.

The previous prime is 5398521763. The next prime is 5398521787. The reversal of 5398521785 is 5871258935.

It can be written as a sum of positive squares in 4 ways, for example, as 2240980921 + 3157540864 = 47339^2 + 56192^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5398521785 - 2¹⁶ = 5398456249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5398521787) 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, 31755926 + ... + 31756095.

It is an arithmetic number, because the mean of its divisors is an integer number (857412297).

Almost surely, 2^5398521785 is an apocalyptic number.

It is an amenable number.

5398521785 is a deficient number, since it is larger than the sum of its proper divisors (1460776591).

5398521785 is a wasteful number, since it uses less digits than its factorization.

5398521785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63512043.

The product of its digits is 3024000, while the sum is 53.

The square root of 5398521785 is about 73474.6336159630. The cubic root of 5398521785 is about 1754.2505421372.

The spelling of 5398521785 in words is "five billion, three hundred ninety-eight million, five hundred twenty-one thousand, seven hundred eighty-five".