1979630378501 has 2 divisors, whose sum is σ = 1979630378502. Its totient is φ = 1979630378500.

The previous prime is 1979630378459. The next prime is 1979630378567. The reversal of 1979630378501 is 1058730369791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1974446522500 + 5183856001 = 1405150^2 + 71999^2 .

It is a cyclic number.

It is not a de Polignac number, because 1979630378501 - 2³⁸ = 1704752471557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1979630372501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 989815189250 + 989815189251.

It is an arithmetic number, because the mean of its divisors is an integer number (989815189251).

Almost surely, 2^{1979630378501} is an apocalyptic number.

It is an amenable number.

1979630378501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1979630378501 is an equidigital number, since it uses as much as digits as its factorization.

1979630378501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8573040, while the sum is 59.

The spelling of 1979630378501 in words is "one trillion, nine hundred seventy-nine billion, six hundred thirty million, three hundred seventy-eight thousand, five hundred one".