65729249943758 has 4 divisors (see below), whose sum is σ = 98593874915640. Its totient is φ = 32864624971878.

The previous prime is 65729249943757. The next prime is 65729249943761. The reversal of 65729249943758 is 85734994292756.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×65729249943758² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65729249943751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16432312485938 + ... + 16432312485941.

It is an arithmetic number, because the mean of its divisors is an integer number (24648468728910).

Almost surely, 2^{65729249943758} is an apocalyptic number.

65729249943758 is a deficient number, since it is larger than the sum of its proper divisors (32864624971882).

65729249943758 is a wasteful number, since it uses less digits than its factorization.

65729249943758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32864624971881.

The product of its digits is 8230118400, while the sum is 80.

The spelling of 65729249943758 in words is "sixty-five trillion, seven hundred twenty-nine billion, two hundred forty-nine million, nine hundred forty-three thousand, seven hundred fifty-eight".