155670920281 has 2 divisors, whose sum is σ = 155670920282. Its totient is φ = 155670920280.

The previous prime is 155670920267. The next prime is 155670920291. The reversal of 155670920281 is 182029076551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127349059600 + 28321860681 = 356860^2 + 168291^2 .

It is a cyclic number.

It is not a de Polignac number, because 155670920281 - 2¹⁵ = 155670887513 is a prime.

It is a super-2 number, since 2×155670920281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (155670920221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77835460140 + 77835460141.

It is an arithmetic number, because the mean of its divisors is an integer number (77835460141).

Almost surely, 2^155670920281 is an apocalyptic number.

It is an amenable number.

155670920281 is a deficient number, since it is larger than the sum of its proper divisors (1).

155670920281 is an equidigital number, since it uses as much as digits as its factorization.

155670920281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 302400, while the sum is 46.

The spelling of 155670920281 in words is "one hundred fifty-five billion, six hundred seventy million, nine hundred twenty thousand, two hundred eighty-one".