287461164781 has 32 divisors (see below), whose sum is σ = 339639125760. Its totient is φ = 238191722496.

The previous prime is 287461164721. The next prime is 287461164787. The reversal of 287461164781 is 187461164782.

It is not a de Polignac number, because 287461164781 - 2¹¹ = 287461162733 is a prime.

It is a super-2 number, since 2×287461164781² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287461164787) 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 31 ways as a sum of consecutive naturals, for example, 12133215 + ... + 12156883.

It is an arithmetic number, because the mean of its divisors is an integer number (10613722680).

Almost surely, 2^287461164781 is an apocalyptic number.

It is an amenable number.

287461164781 is a deficient number, since it is larger than the sum of its proper divisors (52177960979).

287461164781 is a wasteful number, since it uses less digits than its factorization.

287461164781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24133.

The product of its digits is 3612672, while the sum is 55.

Subtracting from 287461164781 its reverse (187461164782), we obtain a palindrome (99999999999).

It can be divided in two parts, 2874611 and 64781, that added together give a palindrome (2939392).

The spelling of 287461164781 in words is "two hundred eighty-seven billion, four hundred sixty-one million, one hundred sixty-four thousand, seven hundred eighty-one".