145644071778 has 24 divisors (see below), whose sum is σ = 332170690800. Its totient is φ = 45992864664.

The previous prime is 145644071777. The next prime is 145644071789. The reversal of 145644071778 is 877170446541.

145644071778 is a `hidden beast` number, since 1 + 4 + 5 + 64 + 407 + 177 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (145644071777) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 212929588 + ... + 212930271.

It is an arithmetic number, because the mean of its divisors is an integer number (13840445450).

Almost surely, 2^145644071778 is an apocalyptic number.

145644071778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

145644071778 is an abundant number, since it is smaller than the sum of its proper divisors (186526619022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145644071778 is a wasteful number, since it uses less digits than its factorization.

145644071778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425859886 (or 425859883 counting only the distinct ones).

The product of its (nonzero) digits is 5268480, while the sum is 54.

The spelling of 145644071778 in words is "one hundred forty-five billion, six hundred forty-four million, seventy-one thousand, seven hundred seventy-eight".