1605412653531 has 32 divisors (see below), whose sum is σ = 2278410393600. Its totient is φ = 1002011129856.

The previous prime is 1605412653529. The next prime is 1605412653539. The reversal of 1605412653531 is 1353562145061.

It is a happy number.

It is not a de Polignac number, because 1605412653531 - 2¹ = 1605412653529 is a prime.

It is a super-2 number, since 2×1605412653531² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1605412653539) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47246910 + ... + 47280876.

It is an arithmetic number, because the mean of its divisors is an integer number (71200324800).

Almost surely, 2^{1605412653531} is an apocalyptic number.

1605412653531 is a deficient number, since it is larger than the sum of its proper divisors (672997740069).

1605412653531 is a wasteful number, since it uses less digits than its factorization.

1605412653531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38843.

The product of its (nonzero) digits is 324000, while the sum is 42.

Adding to 1605412653531 its reverse (1353562145061), we get a palindrome (2958974798592).

The spelling of 1605412653531 in words is "one trillion, six hundred five billion, four hundred twelve million, six hundred fifty-three thousand, five hundred thirty-one".