51490617643 has 8 divisors (see below), whose sum is σ = 52749491760. Its totient is φ = 50231886720.

The previous prime is 51490617601. The next prime is 51490617649. The reversal of 51490617643 is 34671609415.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51490617643 - 2¹³ = 51490609451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51490617593 and 51490617602.

It is not an unprimeable number, because it can be changed into a prime (51490617649) 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, 1244871 + ... + 1285567.

It is an arithmetic number, because the mean of its divisors is an integer number (6593686470).

Almost surely, 2^51490617643 is an apocalyptic number.

51490617643 is a deficient number, since it is larger than the sum of its proper divisors (1258874117).

51490617643 is a wasteful number, since it uses less digits than its factorization.

51490617643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71597.

The product of its (nonzero) digits is 544320, while the sum is 46.

The spelling of 51490617643 in words is "fifty-one billion, four hundred ninety million, six hundred seventeen thousand, six hundred forty-three".