1098779700481 has 8 divisors (see below), whose sum is σ = 1137237903720. Its totient is φ = 1060359447168.

The previous prime is 1098779700463. The next prime is 1098779700497. The reversal of 1098779700481 is 1840079778901.

It can be written as a sum of positive squares in 4 ways, for example, as 12317448256 + 1086462252225 = 110984^2 + 1042335^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1098779700481 - 2³¹ = 1096632216833 is a prime.

It is a super-2 number, since 2×1098779700481² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1098779700461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9428556 + ... + 9544381.

It is an arithmetic number, because the mean of its divisors is an integer number (142154737965).

Almost surely, 2^{1098779700481} is an apocalyptic number.

It is an amenable number.

1098779700481 is a deficient number, since it is larger than the sum of its proper divisors (38458203239).

1098779700481 is a wasteful number, since it uses less digits than its factorization.

1098779700481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18974963.

The product of its (nonzero) digits is 7112448, while the sum is 61.

The spelling of 1098779700481 in words is "one trillion, ninety-eight billion, seven hundred seventy-nine million, seven hundred thousand, four hundred eighty-one".