7854429657157 has 2 divisors, whose sum is σ = 7854429657158. Its totient is φ = 7854429657156.

The previous prime is 7854429657121. The next prime is 7854429657233. The reversal of 7854429657157 is 7517569244587.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7572177594081 + 282252063076 = 2751759^2 + 531274^2 .

It is a cyclic number.

It is not a de Polignac number, because 7854429657157 - 2¹¹ = 7854429655109 is a prime.

It is a super-2 number, since 2×7854429657157² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7854429697157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3927214828578 + 3927214828579.

It is an arithmetic number, because the mean of its divisors is an integer number (3927214828579).

Almost surely, 2^{7854429657157} is an apocalyptic number.

It is an amenable number.

7854429657157 is a deficient number, since it is larger than the sum of its proper divisors (1).

7854429657157 is an equidigital number, since it uses as much as digits as its factorization.

7854429657157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 592704000, while the sum is 70.

The spelling of 7854429657157 in words is "seven trillion, eight hundred fifty-four billion, four hundred twenty-nine million, six hundred fifty-seven thousand, one hundred fifty-seven".