31428761617 has 24 divisors (see below), whose sum is σ = 34870537152. Its totient is φ = 28091817600.

The previous prime is 31428761597. The next prime is 31428761633. The reversal of 31428761617 is 71616782413.

It is not a de Polignac number, because 31428761617 - 2²³ = 31420373009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31428561617) 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, 17163892 + ... + 17165722.

It is an arithmetic number, because the mean of its divisors is an integer number (1452939048).

Almost surely, 2^31428761617 is an apocalyptic number.

It is an amenable number.

31428761617 is a deficient number, since it is larger than the sum of its proper divisors (3441775535).

31428761617 is a wasteful number, since it uses less digits than its factorization.

31428761617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2217 (or 2128 counting only the distinct ones).

The product of its digits is 338688, while the sum is 46.

The spelling of 31428761617 in words is "thirty-one billion, four hundred twenty-eight million, seven hundred sixty-one thousand, six hundred seventeen".