961405511 has 8 divisors (see below), whose sum is σ = 1082638848. Its totient is φ = 845811000.

The previous prime is 961405499. The next prime is 961405513. The reversal of 961405511 is 115504169.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 961405511 - 2¹⁴ = 961389127 is a prime.

It is a super-2 number, since 2×961405511² = 1848601113162342242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961405513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1409345 + ... + 1410026.

It is an arithmetic number, because the mean of its divisors is an integer number (135329856).

Almost surely, 2^961405511 is an apocalyptic number.

961405511 is a deficient number, since it is larger than the sum of its proper divisors (121233337).

961405511 is a wasteful number, since it uses less digits than its factorization.

961405511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2819413.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 961405511 is about 31006.5398101755. The cubic root of 961405511 is about 986.9660238904.

The spelling of 961405511 in words is "nine hundred sixty-one million, four hundred five thousand, five hundred eleven".