261675490 has 16 divisors (see below), whose sum is σ = 471272760. Its totient is φ = 104613120.

The previous prime is 261675457. The next prime is 261675493. The reversal of 261675490 is 94576162.

It can be written as a sum of positive squares in 4 ways, for example, as 261371889 + 303601 = 16167^2 + 551^2 .

It is not an unprimeable number, because it can be changed into a prime (261675493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15556 + ... + 27664.

Almost surely, 2^261675490 is an apocalyptic number.

261675490 is a deficient number, since it is larger than the sum of its proper divisors (209597270).

261675490 is a wasteful number, since it uses less digits than its factorization.

261675490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14277.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 261675490 is about 16176.3868029916. The cubic root of 261675490 is about 639.6184982192.

The spelling of 261675490 in words is "two hundred sixty-one million, six hundred seventy-five thousand, four hundred ninety".