148007767781 has 4 divisors (see below), whose sum is σ = 148064240364. Its totient is φ = 147951295200.

The previous prime is 148007767771. The next prime is 148007767783. The reversal of 148007767781 is 187767700841.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 136782365281 + 11225402500 = 369841^2 + 105950^2 .

It is a cyclic number.

It is not a de Polignac number, because 148007767781 - 2⁶ = 148007767717 is a prime.

It is a super-3 number, since 3×148007767781³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148007767783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28232360 + ... + 28237601.

It is an arithmetic number, because the mean of its divisors is an integer number (37016060091).

Almost surely, 2^148007767781 is an apocalyptic number.

It is an amenable number.

148007767781 is a deficient number, since it is larger than the sum of its proper divisors (56472583).

148007767781 is an equidigital number, since it uses as much as digits as its factorization.

148007767781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56472582.

The product of its (nonzero) digits is 3687936, while the sum is 56.

The spelling of 148007767781 in words is "one hundred forty-eight billion, seven million, seven hundred sixty-seven thousand, seven hundred eighty-one".