78155077433 has 2 divisors, whose sum is σ = 78155077434. Its totient is φ = 78155077432.

The previous prime is 78155077409. The next prime is 78155077453. The reversal of 78155077433 is 33477055187.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66034608784 + 12120468649 = 256972^2 + 110093^2 .

It is a cyclic number.

It is not a de Polignac number, because 78155077433 - 2¹⁰ = 78155076409 is a prime.

It is a super-2 number, since 2×78155077433² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78155077453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39077538716 + 39077538717.

It is an arithmetic number, because the mean of its divisors is an integer number (39077538717).

Almost surely, 2^78155077433 is an apocalyptic number.

It is an amenable number.

78155077433 is a deficient number, since it is larger than the sum of its proper divisors (1).

78155077433 is an equidigital number, since it uses as much as digits as its factorization.

78155077433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2469600, while the sum is 50.

The spelling of 78155077433 in words is "seventy-eight billion, one hundred fifty-five million, seventy-seven thousand, four hundred thirty-three".