74156548489 has 3 divisors (see below), whose sum is σ = 74156820807. Its totient is φ = 74156276172.

The previous prime is 74156548483. The next prime is 74156548493. The reversal of 74156548489 is 98484565147.

The square root of 74156548489 is 272317.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 52755199225 + 21401349264 = 229685^2 + 146292^2 .

It is not a de Polignac number, because 74156548489 - 2³ = 74156548481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74156548481) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 136159 + ... + 408475.

It is an arithmetic number, because the mean of its divisors is an integer number (24718940269).

Almost surely, 2^74156548489 is an apocalyptic number.

74156548489 is the 272317-th square number.

74156548489 is the 136159-th centered octagonal number.

It is an amenable number.

74156548489 is a deficient number, since it is larger than the sum of its proper divisors (272318).

74156548489 is an frugal number, since it uses more digits than its factorization.

74156548489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544634 (or 272317 counting only the distinct ones).

The product of its digits is 38707200, while the sum is 61.

The spelling of 74156548489 in words is "seventy-four billion, one hundred fifty-six million, five hundred forty-eight thousand, four hundred eighty-nine".