145887428881 has 2 divisors, whose sum is σ = 145887428882. Its totient is φ = 145887428880.

The previous prime is 145887428879. The next prime is 145887428941. The reversal of 145887428881 is 188824788541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79984324225 + 65903104656 = 282815^2 + 256716^2 .

It is a cyclic number.

It is not a de Polignac number, because 145887428881 - 2¹ = 145887428879 is a prime.

It is a super-2 number, since 2×145887428881² (a number of 23 digits) contains 22 as substring.

Together with 145887428879, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (145887428381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72943714440 + 72943714441.

It is an arithmetic number, because the mean of its divisors is an integer number (72943714441).

Almost surely, 2^145887428881 is an apocalyptic number.

It is an amenable number.

145887428881 is a deficient number, since it is larger than the sum of its proper divisors (1).

145887428881 is an equidigital number, since it uses as much as digits as its factorization.

145887428881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36700160, while the sum is 64.

The spelling of 145887428881 in words is "one hundred forty-five billion, eight hundred eighty-seven million, four hundred twenty-eight thousand, eight hundred eighty-one".