616591377 has 24 divisors (see below), whose sum is σ = 953638920. Its totient is φ = 382525440.

The previous prime is 616591369. The next prime is 616591403. The reversal of 616591377 is 773195616.

It can be written as a sum of positive squares in 4 ways, for example, as 184117761 + 432473616 = 13569^2 + 20796^2 .

It is not a de Polignac number, because 616591377 - 2³ = 616591369 is a prime.

It is a super-2 number, since 2×616591377² = 760369852381512258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (616591307) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9024 + ... + 36257.

It is an arithmetic number, because the mean of its divisors is an integer number (39734955).

Almost surely, 2^616591377 is an apocalyptic number.

It is an amenable number.

616591377 is a deficient number, since it is larger than the sum of its proper divisors (337047543).

616591377 is a wasteful number, since it uses less digits than its factorization.

616591377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45393 (or 45390 counting only the distinct ones).

The product of its digits is 238140, while the sum is 45.

The square root of 616591377 is about 24831.2580631751. The cubic root of 616591377 is about 851.1363702985.

It can be divided in two parts, 61659 and 1377, that added together give a palindrome (63036).

The spelling of 616591377 in words is "six hundred sixteen million, five hundred ninety-one thousand, three hundred seventy-seven".