135765197651 has 4 divisors (see below), whose sum is σ = 137290649400. Its totient is φ = 134239745904.

The previous prime is 135765197609. The next prime is 135765197671. The reversal of 135765197651 is 156791567531.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 135765197651 - 2⁶ = 135765197587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135765197671) 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, 762725741 + ... + 762725918.

It is an arithmetic number, because the mean of its divisors is an integer number (34322662350).

Almost surely, 2^135765197651 is an apocalyptic number.

135765197651 is a deficient number, since it is larger than the sum of its proper divisors (1525451749).

135765197651 is an equidigital number, since it uses as much as digits as its factorization.

135765197651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525451748.

The product of its digits is 5953500, while the sum is 56.

The spelling of 135765197651 in words is "one hundred thirty-five billion, seven hundred sixty-five million, one hundred ninety-seven thousand, six hundred fifty-one".