1028137782531 has 4 divisors (see below), whose sum is σ = 1370850376712. Its totient is φ = 685425188352.

The previous prime is 1028137782509. The next prime is 1028137782563. The reversal of 1028137782531 is 1352877318201.

It is a happy number.

1028137782531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1028137782531 - 2¹⁵ = 1028137749763 is a prime.

It is a super-2 number, since 2×1028137782531² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1028137786531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171356297086 + ... + 171356297091.

It is an arithmetic number, because the mean of its divisors is an integer number (342712594178).

Almost surely, 2^{1028137782531} is an apocalyptic number.

1028137782531 is a deficient number, since it is larger than the sum of its proper divisors (342712594181).

1028137782531 is an equidigital number, since it uses as much as digits as its factorization.

1028137782531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342712594180.

The product of its (nonzero) digits is 564480, while the sum is 48.

The spelling of 1028137782531 in words is "one trillion, twenty-eight billion, one hundred thirty-seven million, seven hundred eighty-two thousand, five hundred thirty-one".