51156660512 has 12 divisors (see below), whose sum is σ = 100714675446. Its totient is φ = 25578330240.

The previous prime is 51156660473. The next prime is 51156660551. The reversal of 51156660512 is 21506665115.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51156660473) and next prime (51156660551).

It can be written as a sum of positive squares in only one way, i.e., 31398422416 + 19758238096 = 177196^2 + 140564^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 799322789 + ... + 799322852.

Almost surely, 2^51156660512 is an apocalyptic number.

It is an amenable number.

51156660512 is a deficient number, since it is larger than the sum of its proper divisors (49558014934).

51156660512 is a wasteful number, since it uses less digits than its factorization.

51156660512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1598645651 (or 1598645643 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 38.

The spelling of 51156660512 in words is "fifty-one billion, one hundred fifty-six million, six hundred sixty thousand, five hundred twelve".