135907722381 has 4 divisors (see below), whose sum is σ = 181210296512. Its totient is φ = 90605148252.

The previous prime is 135907722367. The next prime is 135907722409. The reversal of 135907722381 is 183227709531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 135907722381 - 2⁹ = 135907721869 is a prime.

It is a super-2 number, since 2×135907722381² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 135907722381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135907722331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22651287061 + ... + 22651287066.

It is an arithmetic number, because the mean of its divisors is an integer number (45302574128).

Almost surely, 2^135907722381 is an apocalyptic number.

It is an amenable number.

135907722381 is a deficient number, since it is larger than the sum of its proper divisors (45302574131).

135907722381 is an equidigital number, since it uses as much as digits as its factorization.

135907722381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45302574130.

The product of its (nonzero) digits is 635040, while the sum is 48.

The spelling of 135907722381 in words is "one hundred thirty-five billion, nine hundred seven million, seven hundred twenty-two thousand, three hundred eighty-one".