6989972535 has 384 divisors, whose sum is σ = 16907304960. Its totient is φ = 2587852800.

The previous prime is 6989972531. The next prime is 6989972551. The reversal of 6989972535 is 5352799896.

6989972535 is a `hidden beast` number, since 6 + 9 + 8 + 9 + 97 + 2 + 535 = 666.

It is not a de Polignac number, because 6989972535 - 2² = 6989972531 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6989972531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 88480626 + ... + 88480704.

It is an arithmetic number, because the mean of its divisors is an integer number (44029440).

Almost surely, 2^6989972535 is an apocalyptic number.

6989972535 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

6989972535 is an abundant number, since it is smaller than the sum of its proper divisors (9917332425).

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

6989972535 is a wasteful number, since it uses less digits than its factorization.

6989972535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 196 counting only the distinct ones).

The product of its digits is 36741600, while the sum is 63.

The square root of 6989972535 is about 83606.0556120189. The cubic root of 6989972535 is about 1912.0173248162.

The spelling of 6989972535 in words is "six billion, nine hundred eighty-nine million, nine hundred seventy-two thousand, five hundred thirty-five".