601038778789 has 2 divisors, whose sum is σ = 601038778790. Its totient is φ = 601038778788.

The previous prime is 601038778783. The next prime is 601038778831. The reversal of 601038778789 is 987877830106.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 362536452100 + 238502326689 = 602110^2 + 488367^2 .

It is a cyclic number.

It is not a de Polignac number, because 601038778789 - 2⁵ = 601038778757 is a prime.

It is a super-2 number, since 2×601038778789² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 601038778789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (601038778783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 300519389394 + 300519389395.

It is an arithmetic number, because the mean of its divisors is an integer number (300519389395).

Almost surely, 2^601038778789 is an apocalyptic number.

It is an amenable number.

601038778789 is a deficient number, since it is larger than the sum of its proper divisors (1).

601038778789 is an equidigital number, since it uses as much as digits as its factorization.

601038778789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28449792, while the sum is 64.

The spelling of 601038778789 in words is "six hundred one billion, thirty-eight million, seven hundred seventy-eight thousand, seven hundred eighty-nine".