64140451400 has 24 divisors (see below), whose sum is σ = 149126549970. Its totient is φ = 25656180480.

The previous prime is 64140451391. The next prime is 64140451499. The reversal of 64140451400 is 415404146.

It can be written as a sum of positive squares in 3 ways, for example, as 51693479044 + 12446972356 = 227362^2 + 111566^2 .

It is a super-2 number, since 2×64140451400² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 160350929 + ... + 160351328.

Almost surely, 2^64140451400 is an apocalyptic number.

It is an amenable number.

64140451400 is an abundant number, since it is smaller than the sum of its proper divisors (84986098570).

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

64140451400 is a wasteful number, since it uses less digits than its factorization.

64140451400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320702273 (or 320702264 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 64140451400 its reverse (415404146), we get a palindrome (64555855546).

The spelling of 64140451400 in words is "sixty-four billion, one hundred forty million, four hundred fifty-one thousand, four hundred".