10100999978 has 4 divisors (see below), whose sum is σ = 15151499970. Its totient is φ = 5050499988.

The previous prime is 10100999969. The next prime is 10100999981. The reversal of 10100999978 is 87999900101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 8702464369 + 1398535609 = 93287^2 + 37397^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2525249993 + ... + 2525249996.

Almost surely, 2^10100999978 is an apocalyptic number.

10100999978 is a deficient number, since it is larger than the sum of its proper divisors (5050499992).

10100999978 is an equidigital number, since it uses as much as digits as its factorization.

10100999978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5050499991.

The product of its (nonzero) digits is 367416, while the sum is 53.

The spelling of 10100999978 in words is "ten billion, one hundred million, nine hundred ninety-nine thousand, nine hundred seventy-eight".