149178644 has 24 divisors (see below), whose sum is σ = 273829248. Its totient is φ = 70975520.

The previous prime is 149178641. The next prime is 149178647. The reversal of 149178644 is 446871941.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (149178641) and next prime (149178647).

It is a junction number, because it is equal to n+sod(n) for n = 149178595 and 149178604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149178641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14009 + ... + 22239.

It is an arithmetic number, because the mean of its divisors is an integer number (11409552).

Almost surely, 2^149178644 is an apocalyptic number.

It is an amenable number.

149178644 is a deficient number, since it is larger than the sum of its proper divisors (124650604).

149178644 is a wasteful number, since it uses less digits than its factorization.

149178644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8455 (or 8453 counting only the distinct ones).

The product of its digits is 193536, while the sum is 44.

The square root of 149178644 is about 12213.8709670604. The cubic root of 149178644 is about 530.3577079694.

The spelling of 149178644 in words is "one hundred forty-nine million, one hundred seventy-eight thousand, six hundred forty-four".