44477780157 has 40 divisors (see below), whose sum is σ = 67652705912. Its totient is φ = 29113344000.

The previous prime is 44477780117. The next prime is 44477780173. The reversal of 44477780157 is 75108777444.

44477780157 is a `hidden beast` number, since 4 + 447 + 77 + 80 + 1 + 57 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 19075476996 + 25402303161 = 138114^2 + 159381^2 .

It is not a de Polignac number, because 44477780157 - 2¹⁴ = 44477763773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44477780117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2843157 + ... + 2858757.

Almost surely, 2^44477780157 is an apocalyptic number.

It is an amenable number.

44477780157 is a deficient number, since it is larger than the sum of its proper divisors (23174925755).

44477780157 is a wasteful number, since it uses less digits than its factorization.

44477780157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16251 (or 16242 counting only the distinct ones).

The product of its (nonzero) digits is 6146560, while the sum is 54.

The spelling of 44477780157 in words is "forty-four billion, four hundred seventy-seven million, seven hundred eighty thousand, one hundred fifty-seven".