5405649637 has 2 divisors, whose sum is σ = 5405649638. Its totient is φ = 5405649636.

The previous prime is 5405649559. The next prime is 5405649649. The reversal of 5405649637 is 7369465045.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4571652996 + 833996641 = 67614^2 + 28879^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5405649637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5405649437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2702824818 + 2702824819.

It is an arithmetic number, because the mean of its divisors is an integer number (2702824819).

Almost surely, 2^5405649637 is an apocalyptic number.

It is an amenable number.

5405649637 is a deficient number, since it is larger than the sum of its proper divisors (1).

5405649637 is an equidigital number, since it uses as much as digits as its factorization.

5405649637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2721600, while the sum is 49.

The square root of 5405649637 is about 73523.1231450351. The cubic root of 5405649637 is about 1755.0222681514.

The spelling of 5405649637 in words is "five billion, four hundred five million, six hundred forty-nine thousand, six hundred thirty-seven".