74921485897 has 4 divisors (see below), whose sum is σ = 74928396240. Its totient is φ = 74914575556.

The previous prime is 74921485889. The next prime is 74921485913. The reversal of 74921485897 is 79858412947.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 74921485897 - 2³ = 74921485889 is a prime.

It is a super-2 number, since 2×74921485897² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74921482897) 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 3 ways as a sum of consecutive naturals, for example, 3438883 + ... + 3460600.

It is an arithmetic number, because the mean of its divisors is an integer number (18732099060).

Almost surely, 2^74921485897 is an apocalyptic number.

It is an amenable number.

74921485897 is a deficient number, since it is larger than the sum of its proper divisors (6910343).

74921485897 is a wasteful number, since it uses less digits than its factorization.

74921485897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6910342.

The product of its digits is 40642560, while the sum is 64.

The spelling of 74921485897 in words is "seventy-four billion, nine hundred twenty-one million, four hundred eighty-five thousand, eight hundred ninety-seven".