51432100006649 has 2 divisors, whose sum is σ = 51432100006650. Its totient is φ = 51432100006648.

The previous prime is 51432100006619. The next prime is 51432100006697. The reversal of 51432100006649 is 94660000123415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51429436930624 + 2663076025 = 7171432^2 + 51605^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51432100006649 is a prime.

It is a super-2 number, since 2×51432100006649² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51432100006619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25716050003324 + 25716050003325.

It is an arithmetic number, because the mean of its divisors is an integer number (25716050003325).

Almost surely, 2^{51432100006649} is an apocalyptic number.

It is an amenable number.

51432100006649 is a deficient number, since it is larger than the sum of its proper divisors (1).

51432100006649 is an equidigital number, since it uses as much as digits as its factorization.

51432100006649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 51432100006649 in words is "fifty-one trillion, four hundred thirty-two billion, one hundred million, six thousand, six hundred forty-nine".