149278777772 has 12 divisors (see below), whose sum is σ = 264816462456. Its totient is φ = 73616931360.

The previous prime is 149278777771. The next prime is 149278777853. The reversal of 149278777772 is 277777872941.

It is a happy number.

It is a super-2 number, since 2×149278777772² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (149278777771) 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, 255614054 + ... + 255614637.

It is an arithmetic number, because the mean of its divisors is an integer number (22068038538).

Almost surely, 2^149278777772 is an apocalyptic number.

It is an amenable number.

149278777772 is a deficient number, since it is larger than the sum of its proper divisors (115537684684).

149278777772 is a wasteful number, since it uses less digits than its factorization.

149278777772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511228768 (or 511228766 counting only the distinct ones).

The product of its digits is 135531648, while the sum is 68.

The spelling of 149278777772 in words is "one hundred forty-nine billion, two hundred seventy-eight million, seven hundred seventy-seven thousand, seven hundred seventy-two".