642416152757 has 2 divisors, whose sum is σ = 642416152758. Its totient is φ = 642416152756.

The previous prime is 642416152621. The next prime is 642416152787. The reversal of 642416152757 is 757251614246.

It is a happy number.

642416152757 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 363224387761 + 279191764996 = 602681^2 + 528386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-642416152757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642416152787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321208076378 + 321208076379.

It is an arithmetic number, because the mean of its divisors is an integer number (321208076379).

Almost surely, 2^642416152757 is an apocalyptic number.

It is an amenable number.

642416152757 is a deficient number, since it is larger than the sum of its proper divisors (1).

642416152757 is an equidigital number, since it uses as much as digits as its factorization.

642416152757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2822400, while the sum is 50.

The spelling of 642416152757 in words is "six hundred forty-two billion, four hundred sixteen million, one hundred fifty-two thousand, seven hundred fifty-seven".