9139454661 has 16 divisors (see below), whose sum is σ = 12665914560. Its totient is φ = 5854974720.

The previous prime is 9139454633. The next prime is 9139454663. The reversal of 9139454661 is 1664549319.

It is a happy number.

It is not a de Polignac number, because 9139454661 - 2⁵ = 9139454629 is a prime.

It is a super-3 number, since 3×9139454661³ (a number of 31 digits) contains 333 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9139454661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9139454663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 230580 + ... + 267293.

It is an arithmetic number, because the mean of its divisors is an integer number (791619660).

Almost surely, 2^9139454661 is an apocalyptic number.

It is an amenable number.

9139454661 is a deficient number, since it is larger than the sum of its proper divisors (3526459899).

9139454661 is a wasteful number, since it uses less digits than its factorization.

9139454661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498116.

The product of its digits is 699840, while the sum is 48.

The square root of 9139454661 is about 95600.4950876302. The cubic root of 9139454661 is about 2090.7724120883.

The spelling of 9139454661 in words is "nine billion, one hundred thirty-nine million, four hundred fifty-four thousand, six hundred sixty-one".