64400141 has 16 divisors (see below), whose sum is σ = 71245440. Its totient is φ = 57844800.

The previous prime is 64400137. The next prime is 64400153. The reversal of 64400141 is 14100446.

It is a happy number.

It is not a de Polignac number, because 64400141 - 2² = 64400137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64400041) 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, 103730 + ... + 104348.

It is an arithmetic number, because the mean of its divisors is an integer number (4452840).

Almost surely, 2^64400141 is an apocalyptic number.

It is an amenable number.

64400141 is a deficient number, since it is larger than the sum of its proper divisors (6845299).

64400141 is a wasteful number, since it uses less digits than its factorization.

64400141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 64400141 is about 8024.9698441801. The cubic root of 64400141 is about 400.8318957576.

Adding to 64400141 its reverse (14100446), we get a palindrome (78500587).

The spelling of 64400141 in words is "sixty-four million, four hundred thousand, one hundred forty-one".