145642856077 has 2 divisors, whose sum is σ = 145642856078. Its totient is φ = 145642856076.

The previous prime is 145642856069. The next prime is 145642856087. The reversal of 145642856077 is 770658246541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121400677476 + 24242178601 = 348426^2 + 155699^2 .

It is an emirp because it is prime and its reverse (770658246541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145642856077 - 2³ = 145642856069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145642856087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72821428038 + 72821428039.

It is an arithmetic number, because the mean of its divisors is an integer number (72821428039).

Almost surely, 2^145642856077 is an apocalyptic number.

It is an amenable number.

145642856077 is a deficient number, since it is larger than the sum of its proper divisors (1).

145642856077 is an equidigital number, since it uses as much as digits as its factorization.

145642856077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11289600, while the sum is 55.

The spelling of 145642856077 in words is "one hundred forty-five billion, six hundred forty-two million, eight hundred fifty-six thousand, seventy-seven".