145894394971 has 16 divisors (see below), whose sum is σ = 157806931968. Its totient is φ = 134081114400.

The previous prime is 145894394959. The next prime is 145894394977. The reversal of 145894394971 is 179493498541.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 145894394971 - 2¹⁵ = 145894362203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145894394977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5309550 + ... + 5336956.

It is an arithmetic number, because the mean of its divisors is an integer number (9862933248).

Almost surely, 2^145894394971 is an apocalyptic number.

145894394971 is a deficient number, since it is larger than the sum of its proper divisors (11912536997).

145894394971 is a wasteful number, since it uses less digits than its factorization.

145894394971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29202.

The product of its digits is 39191040, while the sum is 64.

The spelling of 145894394971 in words is "one hundred forty-five billion, eight hundred ninety-four million, three hundred ninety-four thousand, nine hundred seventy-one".