1975727557 has 16 divisors (see below), whose sum is σ = 2120477184. Its totient is φ = 1837440000.

The previous prime is 1975727549. The next prime is 1975727581. The reversal of 1975727557 is 7557275791.

It is a cyclic number.

It is not a de Polignac number, because 1975727557 - 2³ = 1975727549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1975727498 and 1975727507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1975727527) 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 15 ways as a sum of consecutive naturals, for example, 73557 + ... + 96757.

It is an arithmetic number, because the mean of its divisors is an integer number (132529824).

Almost surely, 2^1975727557 is an apocalyptic number.

It is an amenable number.

1975727557 is a deficient number, since it is larger than the sum of its proper divisors (144749627).

1975727557 is a wasteful number, since it uses less digits than its factorization.

1975727557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23340.

The product of its digits is 5402250, while the sum is 55.

The square root of 1975727557 is about 44449.1569886314. The cubic root of 1975727557 is about 1254.8033970847.

The spelling of 1975727557 in words is "one billion, nine hundred seventy-five million, seven hundred twenty-seven thousand, five hundred fifty-seven".