53073976691 has 2 divisors, whose sum is σ = 53073976692. Its totient is φ = 53073976690.

The previous prime is 53073976679. The next prime is 53073976763. The reversal of 53073976691 is 19667937035.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53073976691 - 2¹⁴ = 53073960307 is a prime.

It is a super-2 number, since 2×53073976691² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (53073976601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26536988345 + 26536988346.

It is an arithmetic number, because the mean of its divisors is an integer number (26536988346).

Almost surely, 2^53073976691 is an apocalyptic number.

53073976691 is a deficient number, since it is larger than the sum of its proper divisors (1).

53073976691 is an equidigital number, since it uses as much as digits as its factorization.

53073976691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6429780, while the sum is 56.

The spelling of 53073976691 in words is "fifty-three billion, seventy-three million, nine hundred seventy-six thousand, six hundred ninety-one".