12551405278 has 16 divisors (see below), whose sum is σ = 19268138736. Its totient is φ = 6128740800.

The previous prime is 12551405261. The next prime is 12551405281. The reversal of 12551405278 is 87250415521.

It is a self number, because there is not a number n which added to its sum of digits gives 12551405278.

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, 1000050 + ... + 1012522.

It is an arithmetic number, because the mean of its divisors is an integer number (1204258671).

Almost surely, 2^12551405278 is an apocalyptic number.

12551405278 is a deficient number, since it is larger than the sum of its proper divisors (6716733458).

12551405278 is a wasteful number, since it uses less digits than its factorization.

12551405278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24219.

The product of its (nonzero) digits is 112000, while the sum is 40.

The spelling of 12551405278 in words is "twelve billion, five hundred fifty-one million, four hundred five thousand, two hundred seventy-eight".