55501156397 has 2 divisors, whose sum is σ = 55501156398. Its totient is φ = 55501156396.

The previous prime is 55501156387. The next prime is 55501156421. The reversal of 55501156397 is 79365110555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36685273156 + 18815883241 = 191534^2 + 137171^2 .

It is a cyclic number.

It is not a de Polignac number, because 55501156397 - 2²⁶ = 55434047533 is a prime.

It is a super-2 number, since 2×55501156397² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55501156387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27750578198 + 27750578199.

It is an arithmetic number, because the mean of its divisors is an integer number (27750578199).

Almost surely, 2^55501156397 is an apocalyptic number.

It is an amenable number.

55501156397 is a deficient number, since it is larger than the sum of its proper divisors (1).

55501156397 is an equidigital number, since it uses as much as digits as its factorization.

55501156397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 708750, while the sum is 47.

The spelling of 55501156397 in words is "fifty-five billion, five hundred one million, one hundred fifty-six thousand, three hundred ninety-seven".