12508212278 has 16 divisors (see below), whose sum is σ = 19796745840. Its totient is φ = 5910861600.

The previous prime is 12508212263. The next prime is 12508212287. The reversal of 12508212278 is 87221280521.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 374933 + ... + 406928.

It is an arithmetic number, because the mean of its divisors is an integer number (1237296615).

Almost surely, 2^12508212278 is an apocalyptic number.

12508212278 is a deficient number, since it is larger than the sum of its proper divisors (7288533562).

12508212278 is a wasteful number, since it uses less digits than its factorization.

12508212278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782303.

The product of its (nonzero) digits is 35840, while the sum is 38.

Adding to 12508212278 its reverse (87221280521), we get a palindrome (99729492799).

The spelling of 12508212278 in words is "twelve billion, five hundred eight million, two hundred twelve thousand, two hundred seventy-eight".