39550166945 has 8 divisors (see below), whose sum is σ = 48355676136. Its totient is φ = 31043149696.

The previous prime is 39550166941. The next prime is 39550166951. The reversal of 39550166945 is 54966105593.

It can be written as a sum of positive squares in 4 ways, for example, as 11441297296 + 28108869649 = 106964^2 + 167657^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39550166945 - 2² = 39550166941 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (39550166941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74622692 + ... + 74623221.

It is an arithmetic number, because the mean of its divisors is an integer number (6044459517).

Almost surely, 2^39550166945 is an apocalyptic number.

It is an amenable number.

39550166945 is a deficient number, since it is larger than the sum of its proper divisors (8805509191).

39550166945 is a wasteful number, since it uses less digits than its factorization.

39550166945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149245971.

The product of its (nonzero) digits is 4374000, while the sum is 53.

The spelling of 39550166945 in words is "thirty-nine billion, five hundred fifty million, one hundred sixty-six thousand, nine hundred forty-five".