1028612692431 has 24 divisors (see below), whose sum is σ = 1499949556560. Its totient is φ = 679201658496.

The previous prime is 1028612692427. The next prime is 1028612692433. The reversal of 1028612692431 is 1342962168201.

1028612692431 is a `hidden beast` number, since 1 + 0 + 2 + 8 + 6 + 126 + 92 + 431 = 666.

It is not a de Polignac number, because 1028612692431 - 2² = 1028612692427 is a prime.

It is a super-2 number, since 2×1028612692431² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028612692433) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5011971 + ... + 5213163.

It is an arithmetic number, because the mean of its divisors is an integer number (62497898190).

Almost surely, 2^{1028612692431} is an apocalyptic number.

1028612692431 is a deficient number, since it is larger than the sum of its proper divisors (471336864129).

1028612692431 is a wasteful number, since it uses less digits than its factorization.

1028612692431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206615 (or 206612 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 1028612692431 in words is "one trillion, twenty-eight billion, six hundred twelve million, six hundred ninety-two thousand, four hundred thirty-one".