145554494639 has 4 divisors (see below), whose sum is σ = 145986407424. Its totient is φ = 145122581856.

The previous prime is 145554494633. The next prime is 145554494671. The reversal of 145554494639 is 936494455541.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145554494639 - 2⁴ = 145554494623 is a prime.

It is a super-2 number, since 2×145554494639² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145554494633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215955887 + ... + 215956560.

It is an arithmetic number, because the mean of its divisors is an integer number (36496601856).

Almost surely, 2^145554494639 is an apocalyptic number.

145554494639 is a deficient number, since it is larger than the sum of its proper divisors (431912785).

145554494639 is an equidigital number, since it uses as much as digits as its factorization.

145554494639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431912784.

The product of its digits is 46656000, while the sum is 59.

The spelling of 145554494639 in words is "one hundred forty-five billion, five hundred fifty-four million, four hundred ninety-four thousand, six hundred thirty-nine".