31428585857146 has 32 divisors (see below), whose sum is σ = 50285239194960. Its totient is φ = 14680862171136.

The previous prime is 31428585857101. The next prime is 31428585857147. The reversal of 31428585857146 is 64175858582413.

It can be written as a sum of positive squares in 8 ways, for example, as 18052632847921 + 13375953009225 = 4248839^2 + 3657315^2 .

It is not an unprimeable number, because it can be changed into a prime (31428585857147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2518051 + ... + 8318518.

Almost surely, 2^{31428585857146} is an apocalyptic number.

31428585857146 is a deficient number, since it is larger than the sum of its proper divisors (18856653337814).

31428585857146 is a wasteful number, since it uses less digits than its factorization.

31428585857146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10837218.

The product of its digits is 258048000, while the sum is 67.

The spelling of 31428585857146 in words is "thirty-one trillion, four hundred twenty-eight billion, five hundred eighty-five million, eight hundred fifty-seven thousand, one hundred forty-six".