51147757461 has 8 divisors (see below), whose sum is σ = 68201519584. Its totient is φ = 34096250160.

The previous prime is 51147757459. The next prime is 51147757469. The reversal of 51147757461 is 16475774115.

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

It is not a de Polignac number, because 51147757461 - 2¹ = 51147757459 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51147757461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51147757469) 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, 510046 + ... + 602031.

It is an arithmetic number, because the mean of its divisors is an integer number (8525189948).

Almost surely, 2^51147757461 is an apocalyptic number.

It is an amenable number.

51147757461 is a deficient number, since it is larger than the sum of its proper divisors (17053762123).

51147757461 is a wasteful number, since it uses less digits than its factorization.

51147757461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127411.

The product of its digits is 823200, while the sum is 48.

The spelling of 51147757461 in words is "fifty-one billion, one hundred forty-seven million, seven hundred fifty-seven thousand, four hundred sixty-one".