51011236123870 has 16 divisors (see below), whose sum is σ = 100167518207088. Its totient is φ = 18549540408640.

The previous prime is 51011236123849. The next prime is 51011236123877. The reversal of 51011236123870 is 7832163211015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51011236123877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231869254999 + ... + 231869255218.

It is an arithmetic number, because the mean of its divisors is an integer number (6260469887943).

Almost surely, 2^{51011236123870} is an apocalyptic number.

51011236123870 is a deficient number, since it is larger than the sum of its proper divisors (49156282083218).

51011236123870 is a wasteful number, since it uses less digits than its factorization.

51011236123870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463738510235.

The product of its (nonzero) digits is 60480, while the sum is 40.

Adding to 51011236123870 its reverse (7832163211015), we get a palindrome (58843399334885).

The spelling of 51011236123870 in words is "fifty-one trillion, eleven billion, two hundred thirty-six million, one hundred twenty-three thousand, eight hundred seventy".