639073391253 has 16 divisors (see below), whose sum is σ = 929879018496. Its totient is φ = 387184822640.

The previous prime is 639073391249. The next prime is 639073391263. The reversal of 639073391253 is 352193370936.

It is a happy number.

639073391253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 639073391253 - 2² = 639073391249 is a prime.

It is a super-2 number, since 2×639073391253² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 639073391196 and 639073391205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639073391263) 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, 3211551 + ... + 3404732.

It is an arithmetic number, because the mean of its divisors is an integer number (58117438656).

Almost surely, 2^639073391253 is an apocalyptic number.

It is an amenable number.

639073391253 is a deficient number, since it is larger than the sum of its proper divisors (290805627243).

639073391253 is a wasteful number, since it uses less digits than its factorization.

639073391253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6619224.

The product of its (nonzero) digits is 2755620, while the sum is 51.

The spelling of 639073391253 in words is "six hundred thirty-nine billion, seventy-three million, three hundred ninety-one thousand, two hundred fifty-three".