77594002249 has 3 divisors (see below), whose sum is σ = 77594280807. Its totient is φ = 77593723692.

The previous prime is 77594002247. The next prime is 77594002259. The reversal of 77594002249 is 94220049577.

The square root of 77594002249 is 278557.

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., 49927668025 + 27666334224 = 223445^2 + 166332^2 .

It is not a de Polignac number, because 77594002249 - 2¹ = 77594002247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77594002247) 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, 139279 + ... + 417835.

It is an arithmetic number, because the mean of its divisors is an integer number (25864760269).

Almost surely, 2^77594002249 is an apocalyptic number.

77594002249 is the 278557-th square number.

77594002249 is the 139279-th centered octagonal number.

It is an amenable number.

77594002249 is a deficient number, since it is larger than the sum of its proper divisors (278558).

77594002249 is an frugal number, since it uses more digits than its factorization.

77594002249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557114 (or 278557 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 49.

Multiplying 77594002249 by its sum of digits (49), we get a square (3802106110201 = 1949899²).

The spelling of 77594002249 in words is "seventy-seven billion, five hundred ninety-four million, two thousand, two hundred forty-nine".