51112623640 has 96 divisors (see below), whose sum is σ = 131855921280. Its totient is φ = 17762174976.

The previous prime is 51112623631. The next prime is 51112623649. The reversal of 51112623640 is 4632621115.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51112623631) and next prime (51112623649).

It is a super-2 number, since 2×51112623640² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51112623649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 107464 + ... + 337303.

It is an arithmetic number, because the mean of its divisors is an integer number (1373499180).

Almost surely, 2^51112623640 is an apocalyptic number.

It is an amenable number.

51112623640 is an abundant number, since it is smaller than the sum of its proper divisors (80743297640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51112623640 is a wasteful number, since it uses less digits than its factorization.

51112623640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444821 (or 444804 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 51112623640 in words is "fifty-one billion, one hundred twelve million, six hundred twenty-three thousand, six hundred forty".