87253445349 has 20 divisors (see below), whose sum is σ = 148961791264. Its totient is φ = 49859111304.

The previous prime is 87253445291. The next prime is 87253445351. The reversal of 87253445349 is 94354435278.

87253445349 is a `hidden beast` number, since 8 + 7 + 253 + 4 + 45 + 349 = 666.

It is not a de Polignac number, because 87253445349 - 2¹⁹ = 87252921061 is a prime.

It is a super-2 number, since 2×87253445349² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 87253445295 and 87253445304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87253445359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 76942507 + ... + 76943640.

Almost surely, 2^87253445349 is an apocalyptic number.

It is an amenable number.

87253445349 is a deficient number, since it is larger than the sum of its proper divisors (61708345915).

87253445349 is a wasteful number, since it uses less digits than its factorization.

87253445349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153886166 (or 153886157 counting only the distinct ones).

The product of its digits is 14515200, while the sum is 54.

The spelling of 87253445349 in words is "eighty-seven billion, two hundred fifty-three million, four hundred forty-five thousand, three hundred forty-nine".