103921637978 has 16 divisors (see below), whose sum is σ = 163940751360. Its totient is φ = 49310298576.

The previous prime is 103921637971. The next prime is 103921637983. The reversal of 103921637978 is 879736129301.

It is not an unprimeable number, because it can be changed into a prime (103921637971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8888513 + ... + 8900196.

It is an arithmetic number, because the mean of its divisors is an integer number (10246296960).

Almost surely, 2^103921637978 is an apocalyptic number.

103921637978 is a deficient number, since it is larger than the sum of its proper divisors (60019113382).

103921637978 is a wasteful number, since it uses less digits than its factorization.

103921637978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17788861.

The product of its (nonzero) digits is 3429216, while the sum is 56.

The spelling of 103921637978 in words is "one hundred three billion, nine hundred twenty-one million, six hundred thirty-seven thousand, nine hundred seventy-eight".