698435987246621 has 16 divisors (see below), whose sum is σ = 759652929777840. Its totient is φ = 638289940147200.

The previous prime is 698435987246581. The next prime is 698435987246651. The reversal of 698435987246621 is 126642789534896.

It can be written as a sum of positive squares in 8 ways, for example, as 5512230578596 + 692923756668025 = 2347814^2 + 26323445^2 .

It is a cyclic number.

It is not a de Polignac number, because 698435987246621 - 2²² = 698435983052317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (698435987246651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7325525 + ... + 38085893.

It is an arithmetic number, because the mean of its divisors is an integer number (47478308111115).

Almost surely, 2^{698435987246621} is an apocalyptic number.

It is an amenable number.

698435987246621 is a deficient number, since it is larger than the sum of its proper divisors (61216942531219).

698435987246621 is a wasteful number, since it uses less digits than its factorization.

698435987246621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30777776.

The product of its digits is 7524679680, while the sum is 80.

The spelling of 698435987246621 in words is "six hundred ninety-eight trillion, four hundred thirty-five billion, nine hundred eighty-seven million, two hundred forty-six thousand, six hundred twenty-one".