42878275251197 has 2 divisors, whose sum is σ = 42878275251198. Its totient is φ = 42878275251196.

The previous prime is 42878275251173. The next prime is 42878275251257. The reversal of 42878275251197 is 79115257287824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42412122226681 + 466153024516 = 6512459^2 + 682754^2 .

It is a cyclic number.

It is not a de Polignac number, because 42878275251197 - 2¹⁶ = 42878275185661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42878275251157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21439137625598 + 21439137625599.

It is an arithmetic number, because the mean of its divisors is an integer number (21439137625599).

Almost surely, 2^{42878275251197} is an apocalyptic number.

It is an amenable number.

42878275251197 is a deficient number, since it is larger than the sum of its proper divisors (1).

42878275251197 is an equidigital number, since it uses as much as digits as its factorization.

42878275251197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158054400, while the sum is 68.

The spelling of 42878275251197 in words is "forty-two trillion, eight hundred seventy-eight billion, two hundred seventy-five million, two hundred fifty-one thousand, one hundred ninety-seven".