29478145445 has 30 divisors (see below), whose sum is σ = 41293299942. Its totient is φ = 20200685904.

The previous prime is 29478145423. The next prime is 29478145493. The reversal of 29478145445 is 54454187492.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 23582516356 + 5895629089 = 153566^2 + 76783^2 .

It is not a de Polignac number, because 29478145445 - 2⁶ = 29478145381 is a prime.

It is a super-2 number, since 2×29478145445² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 18811052 + ... + 18812618.

Almost surely, 2^29478145445 is an apocalyptic number.

It is an amenable number.

29478145445 is a deficient number, since it is larger than the sum of its proper divisors (11815154497).

29478145445 is an frugal number, since it uses more digits than its factorization.

29478145445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3167 (or 1579 counting only the distinct ones).

The product of its digits is 6451200, while the sum is 53.

The spelling of 29478145445 in words is "twenty-nine billion, four hundred seventy-eight million, one hundred forty-five thousand, four hundred forty-five".