51655110651555 has 16 divisors (see below), whose sum is σ = 82686564542880. Its totient is φ = 27536596514048.

The previous prime is 51655110651539. The next prime is 51655110651563. The reversal of 51655110651555 is 55515601155615.

It is a cyclic number.

It is not a de Polignac number, because 51655110651555 - 2⁴ = 51655110651539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51655110651498 and 51655110651507.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 799706220 + ... + 799770809.

It is an arithmetic number, because the mean of its divisors is an integer number (5167910283930).

Almost surely, 2^{51655110651555} is an apocalyptic number.

51655110651555 is a deficient number, since it is larger than the sum of its proper divisors (31031453891325).

51655110651555 is a wasteful number, since it uses less digits than its factorization.

51655110651555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1599479190.

The product of its (nonzero) digits is 2812500, while the sum is 51.

The spelling of 51655110651555 in words is "fifty-one trillion, six hundred fifty-five billion, one hundred ten million, six hundred fifty-one thousand, five hundred fifty-five".