901240739569 has 9 divisors (see below), whose sum is σ = 907393076121. Its totient is φ = 895129857300.

The previous prime is 901240739561. The next prime is 901240739611. The reversal of 901240739569 is 965937042109.

It is a happy number.

The square root of 901240739569 is 949337.

It is a perfect power (a square), and thus also a powerful number.

901240739569 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 901240739569 - 2³ = 901240739561 is a prime.

It is a super-2 number, since 2×901240739569² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (901240739561) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 143346744 + ... + 143353030.

Almost surely, 2^901240739569 is an apocalyptic number.

901240739569 is the 949337-th square number.

901240739569 is the 474669-th centered octagonal number.

It is an amenable number.

901240739569 is a deficient number, since it is larger than the sum of its proper divisors (6152336552).

901240739569 is an frugal number, since it uses more digits than its factorization.

901240739569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12876 (or 6438 counting only the distinct ones).

The product of its (nonzero) digits is 3674160, while the sum is 55.

The spelling of 901240739569 in words is "nine hundred one billion, two hundred forty million, seven hundred thirty-nine thousand, five hundred sixty-nine".