1098649069551 has 24 divisors (see below), whose sum is σ = 1734514818816. Its totient is φ = 664574757840.

The previous prime is 1098649069493. The next prime is 1098649069591. The reversal of 1098649069551 is 1559609468901.

1098649069551 is a `hidden beast` number, since 1 + 0 + 9 + 8 + 6 + 490 + 6 + 95 + 51 = 666.

It is not a de Polignac number, because 1098649069551 - 2¹⁴ = 1098649053167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098649069591) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10557655 + ... + 10661208.

It is an arithmetic number, because the mean of its divisors is an integer number (72271450784).

Almost surely, 2^{1098649069551} is an apocalyptic number.

1098649069551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1098649069551 is a deficient number, since it is larger than the sum of its proper divisors (635865749265).

1098649069551 is a wasteful number, since it uses less digits than its factorization.

1098649069551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21219403 (or 21219400 counting only the distinct ones).

The product of its (nonzero) digits is 20995200, while the sum is 63.

The spelling of 1098649069551 in words is "one trillion, ninety-eight billion, six hundred forty-nine million, sixty-nine thousand, five hundred fifty-one".