690111748538 has 4 divisors (see below), whose sum is σ = 1035167622810. Its totient is φ = 345055874268.

The previous prime is 690111748519. The next prime is 690111748549. The reversal of 690111748538 is 835847111096.

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., 493333450129 + 196778298409 = 702377^2 + 443597^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 690111748538.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172527937133 + ... + 172527937136.

Almost surely, 2^690111748538 is an apocalyptic number.

690111748538 is a deficient number, since it is larger than the sum of its proper divisors (345055874272).

690111748538 is a wasteful number, since it uses less digits than its factorization.

690111748538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345055874271.

The product of its (nonzero) digits is 1451520, while the sum is 53.

The spelling of 690111748538 in words is "six hundred ninety billion, one hundred eleven million, seven hundred forty-eight thousand, five hundred thirty-eight".