1010199849978 has 64 divisors (see below), whose sum is σ = 2210473348992. Its totient is φ = 305233121280.

The previous prime is 1010199849977. The next prime is 1010199850001. The reversal of 1010199849978 is 8799489910101.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1010199849977) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45020650 + ... + 45043082.

It is an arithmetic number, because the mean of its divisors is an integer number (34538646078).

Almost surely, 2^{1010199849978} is an apocalyptic number.

1010199849978 is an abundant number, since it is smaller than the sum of its proper divisors (1200273499014).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1010199849978 is a wasteful number, since it uses less digits than its factorization.

1010199849978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24399.

The product of its (nonzero) digits is 11757312, while the sum is 66.

The spelling of 1010199849978 in words is "one trillion, ten billion, one hundred ninety-nine million, eight hundred forty-nine thousand, nine hundred seventy-eight".