7153421657 has 4 divisors (see below), whose sum is σ = 7224247716. Its totient is φ = 7082595600.

The previous prime is 7153421651. The next prime is 7153421689. The reversal of 7153421657 is 7561243517.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7561243517 = 257 ⋅29421181.

It can be written as a sum of positive squares in 2 ways, for example, as 4379924761 + 2773496896 = 66181^2 + 52664^2 .

It is a cyclic number.

It is not a de Polignac number, because 7153421657 - 2⁶ = 7153421593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7153421651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35412878 + ... + 35413079.

It is an arithmetic number, because the mean of its divisors is an integer number (1806061929).

Almost surely, 2^7153421657 is an apocalyptic number.

It is an amenable number.

7153421657 is a deficient number, since it is larger than the sum of its proper divisors (70826059).

7153421657 is a wasteful number, since it uses less digits than its factorization.

7153421657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70826058.

The product of its digits is 176400, while the sum is 41.

The square root of 7153421657 is about 84577.9028884022. The cubic root of 7153421657 is about 1926.8057857655.

The spelling of 7153421657 in words is "seven billion, one hundred fifty-three million, four hundred twenty-one thousand, six hundred fifty-seven".