7557997557 has 16 divisors (see below), whose sum is σ = 11003470848. Its totient is φ = 4576429680.

The previous prime is 7557997553. The next prime is 7557997561.

7557997557 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (7557997553) and next prime (7557997561).

It is not a de Polignac number, because 7557997557 - 2² = 7557997553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7557997553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67423 + ... + 140220.

It is an arithmetic number, because the mean of its divisors is an integer number (687716928).

Almost surely, 2^7557997557 is an apocalyptic number.

It is an amenable number.

7557997557 is a deficient number, since it is larger than the sum of its proper divisors (3445473291).

7557997557 is a wasteful number, since it uses less digits than its factorization.

7557997557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208760.

The product of its digits is 121550625, while the sum is 66.

The square root of 7557997557 is about 86936.7445732816. The cubic root of 7557997557 is about 1962.4664871121.

The spelling of 7557997557 in words is "seven billion, five hundred fifty-seven million, nine hundred ninety-seven thousand, five hundred fifty-seven".