253621263466 has 4 divisors (see below), whose sum is σ = 380431895202. Its totient is φ = 126810631732.

The previous prime is 253621263463. The next prime is 253621263607. The reversal of 253621263466 is 664362126352.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 235148376241 + 18472887225 = 484921^2 + 135915^2 .

It is not an unprimeable number, because it can be changed into a prime (253621263463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63405315865 + ... + 63405315868.

Almost surely, 2^253621263466 is an apocalyptic number.

253621263466 is a deficient number, since it is larger than the sum of its proper divisors (126810631736).

253621263466 is a wasteful number, since it uses less digits than its factorization.

253621263466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126810631735.

The product of its digits is 1866240, while the sum is 46.

It can be divided in two parts, 25362126346 and 6, that added together give a palindrome (25362126352).

The spelling of 253621263466 in words is "two hundred fifty-three billion, six hundred twenty-one million, two hundred sixty-three thousand, four hundred sixty-six".