51020263642 has 8 divisors (see below), whose sum is σ = 76535824896. Its totient is φ = 25508322012.

The previous prime is 51020263639. The next prime is 51020263681. The reversal of 51020263642 is 24636202015.

51020263642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 869388 + ... + 926215.

It is an arithmetic number, because the mean of its divisors is an integer number (9566978112).

Almost surely, 2^51020263642 is an apocalyptic number.

51020263642 is a deficient number, since it is larger than the sum of its proper divisors (25515561254).

51020263642 is a wasteful number, since it uses less digits than its factorization.

51020263642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1809812.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 51020263642 its reverse (24636202015), we get a palindrome (75656465657).

The spelling of 51020263642 in words is "fifty-one billion, twenty million, two hundred sixty-three thousand, six hundred forty-two".