70905343137 has 4 divisors (see below), whose sum is σ = 94540457520. Its totient is φ = 47270228756.

The previous prime is 70905343121. The next prime is 70905343151. The reversal of 70905343137 is 73134350907.

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, and also an emirpimes, since its reverse is a distinct semiprime: 73134350907 = 3 ⋅24378116969.

It is a cyclic number.

It is not a de Polignac number, because 70905343137 - 2⁴ = 70905343121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70905343177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11817557187 + ... + 11817557192.

It is an arithmetic number, because the mean of its divisors is an integer number (23635114380).

Almost surely, 2^70905343137 is an apocalyptic number.

It is an amenable number.

70905343137 is a deficient number, since it is larger than the sum of its proper divisors (23635114383).

70905343137 is a wasteful number, since it uses less digits than its factorization.

70905343137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23635114382.

The product of its (nonzero) digits is 238140, while the sum is 42.

The spelling of 70905343137 in words is "seventy billion, nine hundred five million, three hundred forty-three thousand, one hundred thirty-seven".