148984774781 has 4 divisors (see below), whose sum is σ = 148992124512. Its totient is φ = 148977425052.

The previous prime is 148984774759. The next prime is 148984774789. The reversal of 148984774781 is 187477489841.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 187477489841 = 29 ⋅6464741029.

It is a cyclic number.

It is not a de Polignac number, because 148984774781 - 2⁶ = 148984774717 is a prime.

It is a super-2 number, since 2×148984774781² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148984774789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3644375 + ... + 3685028.

It is an arithmetic number, because the mean of its divisors is an integer number (37248031128).

Almost surely, 2^148984774781 is an apocalyptic number.

It is an amenable number.

148984774781 is a deficient number, since it is larger than the sum of its proper divisors (7349731).

148984774781 is an equidigital number, since it uses as much as digits as its factorization.

148984774781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7349730.

The product of its digits is 101154816, while the sum is 68.

The spelling of 148984774781 in words is "one hundred forty-eight billion, nine hundred eighty-four million, seven hundred seventy-four thousand, seven hundred eighty-one".