1040648279639 has 2 divisors, whose sum is σ = 1040648279640. Its totient is φ = 1040648279638.

The previous prime is 1040648279617. The next prime is 1040648279647. The reversal of 1040648279639 is 9369728460401.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1040648279639 is a prime.

It is a super-2 number, since 2×1040648279639² (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 (1040648279689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520324139819 + 520324139820.

It is an arithmetic number, because the mean of its divisors is an integer number (520324139820).

Almost surely, 2^{1040648279639} is an apocalyptic number.

1040648279639 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040648279639 is an equidigital number, since it uses as much as digits as its factorization.

1040648279639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15676416, while the sum is 59.

The spelling of 1040648279639 in words is "one trillion, forty billion, six hundred forty-eight million, two hundred seventy-nine thousand, six hundred thirty-nine".