74909490947 has 6 divisors (see below), whose sum is σ = 78308031732. Its totient is φ = 71652556052.

The previous prime is 74909490941. The next prime is 74909491001.

74909490947 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-74909490947 is a prime.

It is a super-2 number, since 2×74909490947² (a number of 23 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74909490947.

It is not an unprimeable number, because it can be changed into a prime (74909490941) 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 5 ways as a sum of consecutive naturals, for example, 70802393 + ... + 70803450.

It is an arithmetic number, because the mean of its divisors is an integer number (13051338622).

Almost surely, 2^74909490947 is an apocalyptic number.

74909490947 is a deficient number, since it is larger than the sum of its proper divisors (3398540785).

74909490947 is a wasteful number, since it uses less digits than its factorization.

74909490947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141605889 (or 141605866 counting only the distinct ones).

The product of its (nonzero) digits is 20575296, while the sum is 62.

The spelling of 74909490947 in words is "seventy-four billion, nine hundred nine million, four hundred ninety thousand, nine hundred forty-seven".