51655110651556 has 12 divisors (see below), whose sum is σ = 90396595715020. Its totient is φ = 25827511875840.

The previous prime is 51655110651539. The next prime is 51655110651563. The reversal of 51655110651556 is 65515601155615.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 43563168057600 + 8091942593956 = 6600240^2 + 2844634^2 .

It is a super-2 number, since 2×51655110651556² (a number of 28 digits) contains 22 as substring.

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, 8110101 + ... + 13003228.

Almost surely, 2^{51655110651556} is an apocalyptic number.

It is an amenable number.

51655110651556 is a deficient number, since it is larger than the sum of its proper divisors (38741485063464).

51655110651556 is a wasteful number, since it uses less digits than its factorization.

51655110651556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21724974 (or 21724972 counting only the distinct ones).

The product of its (nonzero) digits is 3375000, while the sum is 52.

The spelling of 51655110651556 in words is "fifty-one trillion, six hundred fifty-five billion, one hundred ten million, six hundred fifty-one thousand, five hundred fifty-six".