1952081557 has 8 divisors (see below), whose sum is σ = 2037709112. Its totient is φ = 1868184000.

The previous prime is 1952081543. The next prime is 1952081581. The reversal of 1952081557 is 7551802591.

It can be written as a sum of positive squares in 4 ways, for example, as 829094436 + 1122987121 = 28794^2 + 33511^2 .

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 1952081557 - 2¹⁵ = 1952048789 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 (1952081587) 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, 430194 + ... + 434707.

It is an arithmetic number, because the mean of its divisors is an integer number (254713639).

Almost surely, 2^1952081557 is an apocalyptic number.

It is an amenable number.

1952081557 is a deficient number, since it is larger than the sum of its proper divisors (85627555).

1952081557 is an equidigital number, since it uses as much as digits as its factorization.

1952081557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864999.

The product of its (nonzero) digits is 126000, while the sum is 43.

The square root of 1952081557 is about 44182.3670370884. The cubic root of 1952081557 is about 1249.7773591739. Note that the first 3 decimals are identical.

The spelling of 1952081557 in words is "one billion, nine hundred fifty-two million, eighty-one thousand, five hundred fifty-seven".