6638201755 has 16 divisors (see below), whose sum is σ = 8159272704. Its totient is φ = 5181855840.

The previous prime is 6638201707. The next prime is 6638201777. The reversal of 6638201755 is 5571028366.

It is not a de Polignac number, because 6638201755 - 2¹⁹ = 6637677467 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

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, 206692 + ... + 236638.

It is an arithmetic number, because the mean of its divisors is an integer number (509954544).

Almost surely, 2^6638201755 is an apocalyptic number.

6638201755 is a deficient number, since it is larger than the sum of its proper divisors (1521070949).

6638201755 is a wasteful number, since it uses less digits than its factorization.

6638201755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31026.

The product of its (nonzero) digits is 302400, while the sum is 43.

The square root of 6638201755 is about 81475.1603557796. The cubic root of 6638201755 is about 1879.3895855714.

The spelling of 6638201755 in words is "six billion, six hundred thirty-eight million, two hundred one thousand, seven hundred fifty-five".