690036061639 has 4 divisors (see below), whose sum is σ = 730626418224. Its totient is φ = 649445705056.

The previous prime is 690036061621. The next prime is 690036061661. The reversal of 690036061639 is 936160630096.

690036061639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 690036061639 - 2¹¹ = 690036059591 is a prime.

It is a super-2 number, since 2×690036061639² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 690036061592 and 690036061601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690036061609) 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, 20295178267 + ... + 20295178300.

It is an arithmetic number, because the mean of its divisors is an integer number (182656604556).

Almost surely, 2^690036061639 is an apocalyptic number.

690036061639 is a deficient number, since it is larger than the sum of its proper divisors (40590356585).

690036061639 is a wasteful number, since it uses less digits than its factorization.

690036061639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40590356584.

The product of its (nonzero) digits is 944784, while the sum is 49.

The spelling of 690036061639 in words is "six hundred ninety billion, thirty-six million, sixty-one thousand, six hundred thirty-nine".