51340667621481 has 48 divisors (see below), whose sum is σ = 88479457524480. Its totient is φ = 29337123322080.

The previous prime is 51340667621471. The next prime is 51340667621491. The reversal of 51340667621481 is 18412676604315.

51340667621481 is a `hidden beast` number, since 5 + 1 + 3 + 4 + 0 + 6 + 6 + 7 + 621 + 4 + 8 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (51340667621471) and next prime (51340667621491).

It is not a de Polignac number, because 51340667621481 - 2¹¹ = 51340667619433 is a prime.

It is a super-2 number, since 2×51340667621481² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51340667621471) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 115714395 + ... + 116157231.

It is an arithmetic number, because the mean of its divisors is an integer number (1843322031760).

Almost surely, 2^{51340667621481} is an apocalyptic number.

It is an amenable number.

51340667621481 is a deficient number, since it is larger than the sum of its proper divisors (37138789902999).

51340667621481 is a wasteful number, since it uses less digits than its factorization.

51340667621481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530491 (or 530478 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 51340667621481 in words is "fifty-one trillion, three hundred forty billion, six hundred sixty-seven million, six hundred twenty-one thousand, four hundred eighty-one".