65638980031270 has 32 divisors (see below), whose sum is σ = 121054346846496. Its totient is φ = 25610455852800.

The previous prime is 65638980031223. The next prime is 65638980031271. The reversal of 65638980031270 is 7213008983656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65638980031271) 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, 12650721 + ... + 17068060.

It is an arithmetic number, because the mean of its divisors is an integer number (3782948338953).

Almost surely, 2^{65638980031270} is an apocalyptic number.

65638980031270 is a deficient number, since it is larger than the sum of its proper divisors (55415366815226).

65638980031270 is a wasteful number, since it uses less digits than its factorization.

65638980031270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29724216.

The product of its (nonzero) digits is 13063680, while the sum is 58.

The spelling of 65638980031270 in words is "sixty-five trillion, six hundred thirty-eight billion, nine hundred eighty million, thirty-one thousand, two hundred seventy".