371880281561 has 2 divisors, whose sum is σ = 371880281562. Its totient is φ = 371880281560.

The previous prime is 371880281537. The next prime is 371880281567. The reversal of 371880281561 is 165182088173.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 232560240025 + 139320041536 = 482245^2 + 373256^2 .

It is a cyclic number.

It is not a de Polignac number, because 371880281561 - 2¹⁴ = 371880265177 is a prime.

It is not a weakly prime, because it can be changed into another prime (371880281567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 185940140780 + 185940140781.

It is an arithmetic number, because the mean of its divisors is an integer number (185940140781).

Almost surely, 2^371880281561 is an apocalyptic number.

It is an amenable number.

371880281561 is a deficient number, since it is larger than the sum of its proper divisors (1).

371880281561 is an equidigital number, since it uses as much as digits as its factorization.

371880281561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 645120, while the sum is 50.

The spelling of 371880281561 in words is "three hundred seventy-one billion, eight hundred eighty million, two hundred eighty-one thousand, five hundred sixty-one".