690737987563 has 6 divisors (see below), whose sum is σ = 747958886124. Its totient is φ = 637604296056.

The previous prime is 690737987539. The next prime is 690737987623. The reversal of 690737987563 is 365789737096.

It is not a de Polignac number, because 690737987563 - 2²⁹ = 690201116651 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 690737987492 and 690737987501.

It is not an unprimeable number, because it can be changed into a prime (690737987063) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2043603345 + ... + 2043603682.

It is an arithmetic number, because the mean of its divisors is an integer number (124659814354).

Almost surely, 2^690737987563 is an apocalyptic number.

690737987563 is a deficient number, since it is larger than the sum of its proper divisors (57220898561).

690737987563 is a wasteful number, since it uses less digits than its factorization.

690737987563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4087207053 (or 4087207040 counting only the distinct ones).

The product of its (nonzero) digits is 360067680, while the sum is 70.

The spelling of 690737987563 in words is "six hundred ninety billion, seven hundred thirty-seven million, nine hundred eighty-seven thousand, five hundred sixty-three".