38455157857549 has 2 divisors, whose sum is σ = 38455157857550. Its totient is φ = 38455157857548.

The previous prime is 38455157857531. The next prime is 38455157857561. The reversal of 38455157857549 is 94575875155483.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30584018999524 + 7871138858025 = 5530282^2 + 2805555^2 .

It is a cyclic number.

It is not a de Polignac number, because 38455157857549 - 2⁷ = 38455157857421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38455157857849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19227578928774 + 19227578928775.

It is an arithmetic number, because the mean of its divisors is an integer number (19227578928775).

Almost surely, 2^{38455157857549} is an apocalyptic number.

It is an amenable number.

38455157857549 is a deficient number, since it is larger than the sum of its proper divisors (1).

38455157857549 is an equidigital number, since it uses as much as digits as its factorization.

38455157857549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4233600000, while the sum is 76.

The spelling of 38455157857549 in words is "thirty-eight trillion, four hundred fifty-five billion, one hundred fifty-seven million, eight hundred fifty-seven thousand, five hundred forty-nine".