98735191801 has 4 divisors (see below), whose sum is σ = 98735833204. Its totient is φ = 98734550400.

The previous prime is 98735191783. The next prime is 98735191813. The reversal of 98735191801 is 10819153789.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 95048273401 + 3686918400 = 308299^2 + 60720^2 .

It is a 3-Lehmer number, since φ(98735191801) divides (98735191801-1)³.

It is a cyclic number.

It is not a de Polignac number, because 98735191801 - 2²³ = 98726803193 is a prime.

It is a deceptive number, since it divides R_98735191800.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (98735191831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64141 + ... + 448981.

It is an arithmetic number, because the mean of its divisors is an integer number (24683958301).

Almost surely, 2^98735191801 is an apocalyptic number.

98735191801 is the 256561-st pentagonal number.

It is an amenable number.

98735191801 is a deficient number, since it is larger than the sum of its proper divisors (641403).

98735191801 is a wasteful number, since it uses less digits than its factorization.

98735191801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641402.

The product of its (nonzero) digits is 544320, while the sum is 52.

The spelling of 98735191801 in words is "ninety-eight billion, seven hundred thirty-five million, one hundred ninety-one thousand, eight hundred one".