156484894981 has 2 divisors, whose sum is σ = 156484894982. Its totient is φ = 156484894980.

The previous prime is 156484894963. The next prime is 156484895003. The reversal of 156484894981 is 189498484651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135563876100 + 20921018881 = 368190^2 + 144641^2 .

It is a cyclic number.

It is not a de Polignac number, because 156484894981 - 2¹¹ = 156484892933 is a prime.

It is a super-2 number, since 2×156484894981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156484894931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78242447490 + 78242447491.

It is an arithmetic number, because the mean of its divisors is an integer number (78242447491).

Almost surely, 2^156484894981 is an apocalyptic number.

It is an amenable number.

156484894981 is a deficient number, since it is larger than the sum of its proper divisors (1).

156484894981 is an equidigital number, since it uses as much as digits as its factorization.

156484894981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 79626240, while the sum is 67.

The spelling of 156484894981 in words is "one hundred fifty-six billion, four hundred eighty-four million, eight hundred ninety-four thousand, nine hundred eighty-one".