815142939007 has 2 divisors, whose sum is σ = 815142939008. Its totient is φ = 815142939006.

The previous prime is 815142939001. The next prime is 815142939019. The reversal of 815142939007 is 700939241518.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-815142939007 is a prime.

It is a super-2 number, since 2×815142939007² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (815142939001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407571469503 + 407571469504.

It is an arithmetic number, because the mean of its divisors is an integer number (407571469504).

Almost surely, 2^815142939007 is an apocalyptic number.

815142939007 is a deficient number, since it is larger than the sum of its proper divisors (1).

815142939007 is an equidigital number, since it uses as much as digits as its factorization.

815142939007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 544320, while the sum is 49.

The spelling of 815142939007 in words is "eight hundred fifteen billion, one hundred forty-two million, nine hundred thirty-nine thousand, seven".