64140755 has 12 divisors (see below), whose sum is σ = 89535600. Its totient is φ = 43982064.

The previous prime is 64140743. The next prime is 64140763. The reversal of 64140755 is 55704146.

It is not a de Polignac number, because 64140755 - 2⁶ = 64140691 is a prime.

It is a super-2 number, since 2×64140755² = 8228072903940050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 130655 + ... + 131144.

It is an arithmetic number, because the mean of its divisors is an integer number (7461300).

Almost surely, 2^64140755 is an apocalyptic number.

64140755 is a deficient number, since it is larger than the sum of its proper divisors (25394845).

64140755 is a wasteful number, since it uses less digits than its factorization.

64140755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261818 (or 261811 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 64140755 is about 8008.7923559049. The cubic root of 64140755 is about 400.2930248720.

The spelling of 64140755 in words is "sixty-four million, one hundred forty thousand, seven hundred fifty-five".