721819370098 has 4 divisors (see below), whose sum is σ = 1082729055150. Its totient is φ = 360909685048.

The previous prime is 721819370087. The next prime is 721819370177. The reversal of 721819370098 is 890073918127.

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., 602730191449 + 119089178649 = 776357^2 + 345093^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180454842523 + ... + 180454842526.

Almost surely, 2^721819370098 is an apocalyptic number.

721819370098 is a deficient number, since it is larger than the sum of its proper divisors (360909685052).

721819370098 is a wasteful number, since it uses less digits than its factorization.

721819370098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360909685051.

The product of its (nonzero) digits is 1524096, while the sum is 55.

The spelling of 721819370098 in words is "seven hundred twenty-one billion, eight hundred nineteen million, three hundred seventy thousand, ninety-eight".