919940706061 has 4 divisors (see below), whose sum is σ = 990705375772. Its totient is φ = 849176036352.

The previous prime is 919940706049. The next prime is 919940706071. The reversal of 919940706061 is 160607049919.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 160607049919 = 11743 ⋅13676833.

It can be written as a sum of positive squares in 2 ways, for example, as 98153130436 + 821787575625 = 313294^2 + 906525^2 .

It is a cyclic number.

It is not a de Polignac number, because 919940706061 - 2¹¹ = 919940704013 is a prime.

It is a super-2 number, since 2×919940706061² (a number of 25 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 (919940706071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35382334836 + ... + 35382334861.

It is an arithmetic number, because the mean of its divisors is an integer number (247676343943).

Almost surely, 2^919940706061 is an apocalyptic number.

It is an amenable number.

919940706061 is a deficient number, since it is larger than the sum of its proper divisors (70764669711).

919940706061 is a wasteful number, since it uses less digits than its factorization.

919940706061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70764669710.

The product of its (nonzero) digits is 734832, while the sum is 52.

The spelling of 919940706061 in words is "nine hundred nineteen billion, nine hundred forty million, seven hundred six thousand, sixty-one".