31428573761 has 8 divisors (see below), whose sum is σ = 35837106984. Its totient is φ = 27304462080.

The previous prime is 31428573703. The next prime is 31428573763. The reversal of 31428573761 is 16737582413.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 269616400 + 31158957361 = 16420^2 + 176519^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31428573761 - 2²² = 31424379457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31428573763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71105150 + ... + 71105591.

It is an arithmetic number, because the mean of its divisors is an integer number (4479638373).

Almost surely, 2^31428573761 is an apocalyptic number.

It is an amenable number.

31428573761 is a deficient number, since it is larger than the sum of its proper divisors (4408533223).

31428573761 is a wasteful number, since it uses less digits than its factorization.

31428573761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142210771.

The product of its digits is 846720, while the sum is 47.

The spelling of 31428573761 in words is "thirty-one billion, four hundred twenty-eight million, five hundred seventy-three thousand, seven hundred sixty-one".