742778895049669 has 16 divisors (see below), whose sum is σ = 748834615416832. Its totient is φ = 736747727459328.

The previous prime is 742778895049651. The next prime is 742778895049687. The reversal of 742778895049669 is 966940598877247.

742778895049669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (742778895049651) and next prime (742778895049687).

It is a cyclic number.

It is not a de Polignac number, because 742778895049669 - 2⁵ = 742778895049637 is a prime.

It is a super-2 number, since 2×742778895049669² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742778895049649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1553486932 + ... + 1553964994.

It is an arithmetic number, because the mean of its divisors is an integer number (46802163463552).

Almost surely, 2^{742778895049669} is an apocalyptic number.

It is an amenable number.

742778895049669 is a deficient number, since it is larger than the sum of its proper divisors (6055720367163).

742778895049669 is a wasteful number, since it uses less digits than its factorization.

742778895049669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503716.

The product of its (nonzero) digits is 92177326080, while the sum is 91.

The spelling of 742778895049669 in words is "seven hundred forty-two trillion, seven hundred seventy-eight billion, eight hundred ninety-five million, forty-nine thousand, six hundred sixty-nine".