490194196157 has 2 divisors, whose sum is σ = 490194196158. Its totient is φ = 490194196156.

The previous prime is 490194196081. The next prime is 490194196201. The reversal of 490194196157 is 751691491094.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 416359177081 + 73835019076 = 645259^2 + 271726^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-490194196157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (490194196057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245097098078 + 245097098079.

It is an arithmetic number, because the mean of its divisors is an integer number (245097098079).

Almost surely, 2^490194196157 is an apocalyptic number.

It is an amenable number.

490194196157 is a deficient number, since it is larger than the sum of its proper divisors (1).

490194196157 is an equidigital number, since it uses as much as digits as its factorization.

490194196157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2449440, while the sum is 56.

The spelling of 490194196157 in words is "four hundred ninety billion, one hundred ninety-four million, one hundred ninety-six thousand, one hundred fifty-seven".