645153351546 has 32 divisors (see below), whose sum is σ = 1421544033216. Its totient is φ = 193565360000.

The previous prime is 645153351539. The next prime is 645153351581.

645153351546 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×645153351546² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 645153351495 and 645153351504.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48384675 + ... + 48398006.

It is an arithmetic number, because the mean of its divisors is an integer number (44423251038).

Almost surely, 2^645153351546 is an apocalyptic number.

645153351546 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

645153351546 is an abundant number, since it is smaller than the sum of its proper divisors (776390681670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645153351546 is a wasteful number, since it uses less digits than its factorization.

645153351546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96782798.

The product of its digits is 3240000, while the sum is 48.

It can be divided in two parts, 645153 and 351546, that added together give a palindrome (996699).

The spelling of 645153351546 in words is "six hundred forty-five billion, one hundred fifty-three million, three hundred fifty-one thousand, five hundred forty-six".