26463121506 has 24 divisors (see below), whose sum is σ = 57502012464. Its totient is φ = 8795617560.

The previous prime is 26463121493. The next prime is 26463121507. The reversal of 26463121506 is 60512136462.

26463121506 is a `hidden beast` number, since 2 + 6 + 4 + 631 + 2 + 15 + 0 + 6 = 666.

It is not an unprimeable number, because it can be changed into a prime (26463121507) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2112160 + ... + 2124651.

It is an arithmetic number, because the mean of its divisors is an integer number (2395917186).

Almost surely, 2^26463121506 is an apocalyptic number.

26463121506 is an abundant number, since it is smaller than the sum of its proper divisors (31038890958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26463121506 is a wasteful number, since it uses less digits than its factorization.

26463121506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4237166 (or 4237163 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

Adding to 26463121506 its reverse (60512136462), we get a palindrome (86975257968).

The spelling of 26463121506 in words is "twenty-six billion, four hundred sixty-three million, one hundred twenty-one thousand, five hundred six".