961378923838 has 8 divisors (see below), whose sum is σ = 1450404041688. Its totient is φ = 477910909944.

The previous prime is 961378923811. The next prime is 961378923853. The reversal of 961378923838 is 838329873169.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×961378923838² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1389275556 + ... + 1389276247.

It is an arithmetic number, because the mean of its divisors is an integer number (181300505211).

Almost surely, 2^961378923838 is an apocalyptic number.

961378923838 is a deficient number, since it is larger than the sum of its proper divisors (489025117850).

961378923838 is a wasteful number, since it uses less digits than its factorization.

961378923838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2778551978.

The product of its digits is 94058496, while the sum is 67.

The spelling of 961378923838 in words is "nine hundred sixty-one billion, three hundred seventy-eight million, nine hundred twenty-three thousand, eight hundred thirty-eight".