136745924251 has 4 divisors (see below), whose sum is σ = 138282395400. Its totient is φ = 135209453104.

The previous prime is 136745924221. The next prime is 136745924279. The reversal of 136745924251 is 152429547631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 152429547631 = 93241 ⋅1634791.

It is a cyclic number.

It is not a de Polignac number, because 136745924251 - 2¹⁹ = 136745399963 is a prime.

It is a super-2 number, since 2×136745924251² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136745924195 and 136745924204.

It is not an unprimeable number, because it can be changed into a prime (136745924201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 768235441 + ... + 768235618.

It is an arithmetic number, because the mean of its divisors is an integer number (34570598850).

Almost surely, 2^136745924251 is an apocalyptic number.

136745924251 is a deficient number, since it is larger than the sum of its proper divisors (1536471149).

136745924251 is an equidigital number, since it uses as much as digits as its factorization.

136745924251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536471148.

The product of its digits is 1814400, while the sum is 49.

The spelling of 136745924251 in words is "one hundred thirty-six billion, seven hundred forty-five million, nine hundred twenty-four thousand, two hundred fifty-one".