7854429697157 has 2 divisors, whose sum is σ = 7854429697158. Its totient is φ = 7854429697156.

The previous prime is 7854429697139. The next prime is 7854429697199. The reversal of 7854429697157 is 7517969244587.

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., 5928401998561 + 1926027698596 = 2434831^2 + 1387814^2 .

It is a cyclic number.

It is not a de Polignac number, because 7854429697157 - 2¹⁰ = 7854429696133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7854429693157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3927214848578 + 3927214848579.

It is an arithmetic number, because the mean of its divisors is an integer number (3927214848579).

Almost surely, 2^{7854429697157} is an apocalyptic number.

It is an amenable number.

7854429697157 is a deficient number, since it is larger than the sum of its proper divisors (1).

7854429697157 is an equidigital number, since it uses as much as digits as its factorization.

7854429697157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1066867200, while the sum is 74.

The spelling of 7854429697157 in words is "seven trillion, eight hundred fifty-four billion, four hundred twenty-nine million, six hundred ninety-seven thousand, one hundred fifty-seven".