309526740993 has 16 divisors (see below), whose sum is σ = 431228712960. Its totient is φ = 197112248784.

The previous prime is 309526740979. The next prime is 309526740997. The reversal of 309526740993 is 399047625903.

It is a happy number.

It is not a de Polignac number, because 309526740993 - 2⁴ = 309526740977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (309526740997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2984121 + ... + 3086102.

It is an arithmetic number, because the mean of its divisors is an integer number (26951794560).

Almost surely, 2^309526740993 is an apocalyptic number.

It is an amenable number.

309526740993 is a deficient number, since it is larger than the sum of its proper divisors (121701971967).

309526740993 is a wasteful number, since it uses less digits than its factorization.

309526740993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6070988.

The product of its (nonzero) digits is 11022480, while the sum is 57.

It can be divided in two parts, 3095267 and 40993, that added together give a triangular number (3136260 = T₂₅₀₄).

The spelling of 309526740993 in words is "three hundred nine billion, five hundred twenty-six million, seven hundred forty thousand, nine hundred ninety-three".