19790164501 has 2 divisors, whose sum is σ = 19790164502. Its totient is φ = 19790164500.

The previous prime is 19790164489. The next prime is 19790164529. The reversal of 19790164501 is 10546109791.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14143393476 + 5646771025 = 118926^2 + 75145^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19790164501 is a prime.

It is a super-2 number, since 2×19790164501² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19790164591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9895082250 + 9895082251.

It is an arithmetic number, because the mean of its divisors is an integer number (9895082251).

Almost surely, 2^19790164501 is an apocalyptic number.

It is an amenable number.

19790164501 is a deficient number, since it is larger than the sum of its proper divisors (1).

19790164501 is an equidigital number, since it uses as much as digits as its factorization.

19790164501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 43.

The spelling of 19790164501 in words is "nineteen billion, seven hundred ninety million, one hundred sixty-four thousand, five hundred one".