49321978507 has 2 divisors, whose sum is σ = 49321978508. Its totient is φ = 49321978506.

The previous prime is 49321978499. The next prime is 49321978561. The reversal of 49321978507 is 70587912394.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49321978507 - 2³ = 49321978499 is a prime.

It is not a weakly prime, because it can be changed into another prime (49321918507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24660989253 + 24660989254.

It is an arithmetic number, because the mean of its divisors is an integer number (24660989254).

Almost surely, 2^49321978507 is an apocalyptic number.

49321978507 is a deficient number, since it is larger than the sum of its proper divisors (1).

49321978507 is an equidigital number, since it uses as much as digits as its factorization.

49321978507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3810240, while the sum is 55.

The spelling of 49321978507 in words is "forty-nine billion, three hundred twenty-one million, nine hundred seventy-eight thousand, five hundred seven".