149148979181 has 2 divisors, whose sum is σ = 149148979182. Its totient is φ = 149148979180.

The previous prime is 149148979159. The next prime is 149148979201. The reversal of 149148979181 is 181979841941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146969489956 + 2179489225 = 383366^2 + 46685^2 .

It is a cyclic number.

It is not a de Polignac number, because 149148979181 - 2¹⁰ = 149148978157 is a prime.

It is a super-2 number, since 2×149148979181² (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 (149148909181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74574489590 + 74574489591.

It is an arithmetic number, because the mean of its divisors is an integer number (74574489591).

Almost surely, 2^149148979181 is an apocalyptic number.

It is an amenable number.

149148979181 is a deficient number, since it is larger than the sum of its proper divisors (1).

149148979181 is an equidigital number, since it uses as much as digits as its factorization.

149148979181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5225472, while the sum is 62.

The spelling of 149148979181 in words is "one hundred forty-nine billion, one hundred forty-eight million, nine hundred seventy-nine thousand, one hundred eighty-one".