690495002540 has 48 divisors (see below), whose sum is σ = 1710645694464. Its totient is φ = 229104331200.

The previous prime is 690495002539. The next prime is 690495002597. The reversal of 690495002540 is 45200594096.

It is a junction number, because it is equal to n+sod(n) for n = 690495002491 and 690495002500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79545776 + ... + 79554455.

It is an arithmetic number, because the mean of its divisors is an integer number (35638451968).

Almost surely, 2^690495002540 is an apocalyptic number.

It is an amenable number.

690495002540 is an abundant number, since it is smaller than the sum of its proper divisors (1020150691924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

690495002540 is a wasteful number, since it uses less digits than its factorization.

690495002540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159100278 (or 159100276 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 690495002540 in words is "six hundred ninety billion, four hundred ninety-five million, two thousand, five hundred forty".