7342978786531 has 2 divisors, whose sum is σ = 7342978786532. Its totient is φ = 7342978786530.

The previous prime is 7342978786529. The next prime is 7342978786669. The reversal of 7342978786531 is 1356878792437.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7342978786531 - 2¹ = 7342978786529 is a prime.

It is a super-2 number, since 2×7342978786531² (a number of 27 digits) contains 22 as substring.

Together with 7342978786529, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (7342978786331) 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 as a sum of consecutive naturals, namely, 3671489393265 + 3671489393266.

It is an arithmetic number, because the mean of its divisors is an integer number (3671489393266).

Almost surely, 2^{7342978786531} is an apocalyptic number.

7342978786531 is a deficient number, since it is larger than the sum of its proper divisors (1).

7342978786531 is an equidigital number, since it uses as much as digits as its factorization.

7342978786531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 426746880, while the sum is 70.

The spelling of 7342978786531 in words is "seven trillion, three hundred forty-two billion, nine hundred seventy-eight million, seven hundred eighty-six thousand, five hundred thirty-one".