145408397994 has 32 divisors (see below), whose sum is σ = 330004880640. Its totient is φ = 47438199936.

The previous prime is 145408397977. The next prime is 145408398017. The reversal of 145408397994 is 499793804541.

145408397994 is a `hidden beast` number, since 1 + 4 + 540 + 83 + 9 + 7 + 9 + 9 + 4 = 666.

It is a super-2 number, since 2×145408397994² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28643719 + ... + 28648794.

It is an arithmetic number, because the mean of its divisors is an integer number (10312652520).

Almost surely, 2^145408397994 is an apocalyptic number.

145408397994 is an abundant number, since it is smaller than the sum of its proper divisors (184596482646).

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

145408397994 is a wasteful number, since it uses less digits than its factorization.

145408397994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57292571 (or 57292565 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 63.

The spelling of 145408397994 in words is "one hundred forty-five billion, four hundred eight million, three hundred ninety-seven thousand, nine hundred ninety-four".