51263443670 has 16 divisors (see below), whose sum is σ = 93225480768. Its totient is φ = 20293981440.

The previous prime is 51263443619. The next prime is 51263443727. The reversal of 51263443670 is 7634436215.

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, 26423486 + ... + 26425425.

It is an arithmetic number, because the mean of its divisors is an integer number (5826592548).

Almost surely, 2^51263443670 is an apocalyptic number.

51263443670 is a deficient number, since it is larger than the sum of its proper divisors (41962037098).

51263443670 is a wasteful number, since it uses less digits than its factorization.

51263443670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52849015.

The product of its (nonzero) digits is 362880, while the sum is 41.

Adding to 51263443670 its reverse (7634436215), we get a palindrome (58897879885).

The spelling of 51263443670 in words is "fifty-one billion, two hundred sixty-three million, four hundred forty-three thousand, six hundred seventy".