7515445157 has 6 divisors (see below), whose sum is σ = 8260778694. Its totient is φ = 6832222760.

The previous prime is 7515445139. The next prime is 7515445163.

7515445157 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 5704176676 + 1811268481 = 75526^2 + 42559^2 .

It is not a de Polignac number, because 7515445157 - 2²⁰ = 7514396581 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 (7515442157) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31055438 + ... + 31055679.

It is an arithmetic number, because the mean of its divisors is an integer number (1376796449).

Almost surely, 2^7515445157 is an apocalyptic number.

It is an amenable number.

7515445157 is a deficient number, since it is larger than the sum of its proper divisors (745333537).

7515445157 is a wasteful number, since it uses less digits than its factorization.

7515445157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62111139 (or 62111128 counting only the distinct ones).

The product of its digits is 490000, while the sum is 44.

The square root of 7515445157 is about 86691.6671716492. The cubic root of 7515445157 is about 1958.7765824950.

The spelling of 7515445157 in words is "seven billion, five hundred fifteen million, four hundred forty-five thousand, one hundred fifty-seven".