69491991481 has 8 divisors (see below), whose sum is σ = 75867463584. Its totient is φ = 63126189120.

The previous prime is 69491991469. The next prime is 69491991493. The reversal of 69491991481 is 18419919496.

It is an interprime number because it is at equal distance from previous prime (69491991469) and next prime (69491991493).

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

It is a cyclic number.

It is not a de Polignac number, because 69491991481 - 2⁵ = 69491991449 is a prime.

It is a super-2 number, since 2×69491991481² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (69491991431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2402400 + ... + 2431153.

It is an arithmetic number, because the mean of its divisors is an integer number (9483432948).

Almost surely, 2^69491991481 is an apocalyptic number.

It is an amenable number.

69491991481 is a deficient number, since it is larger than the sum of its proper divisors (6375472103).

69491991481 is a wasteful number, since it uses less digits than its factorization.

69491991481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4834871.

The product of its digits is 5038848, while the sum is 61.

The spelling of 69491991481 in words is "sixty-nine billion, four hundred ninety-one million, nine hundred ninety-one thousand, four hundred eighty-one".