385557790489 has 3 divisors (see below), whose sum is σ = 385558411423. Its totient is φ = 385557169556.

The previous prime is 385557790481. The next prime is 385557790517. The reversal of 385557790489 is 984097755583.

The square root of 385557790489 is 620933.

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., 362542473225 + 23015317264 = 602115^2 + 151708^2 .

It is not a de Polignac number, because 385557790489 - 2³ = 385557790481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385557790481) 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, 310467 + ... + 931399.

Almost surely, 2^385557790489 is an apocalyptic number.

385557790489 is the 620933-rd square number.

385557790489 is the 310467-th centered octagonal number.

It is an amenable number.

385557790489 is a deficient number, since it is larger than the sum of its proper divisors (620934).

385557790489 is an frugal number, since it uses more digits than its factorization.

385557790489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1241866 (or 620933 counting only the distinct ones).

The product of its (nonzero) digits is 381024000, while the sum is 70.

The spelling of 385557790489 in words is "three hundred eighty-five billion, five hundred fifty-seven million, seven hundred ninety thousand, four hundred eighty-nine".