961135855901 has 16 divisors (see below), whose sum is σ = 1104892467840. Its totient is φ = 828669320640.

The previous prime is 961135855891. The next prime is 961135855937. The reversal of 961135855901 is 109558531169.

961135855901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 961135855901 - 2²² = 961131661597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961135858901) 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, 27385550 + ... + 27420623.

It is an arithmetic number, because the mean of its divisors is an integer number (69055779240).

Almost surely, 2^961135855901 is an apocalyptic number.

It is an amenable number.

961135855901 is a deficient number, since it is larger than the sum of its proper divisors (143756611939).

961135855901 is a wasteful number, since it uses less digits than its factorization.

961135855901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54806276.

The product of its (nonzero) digits is 1458000, while the sum is 53.

The spelling of 961135855901 in words is "nine hundred sixty-one billion, one hundred thirty-five million, eight hundred fifty-five thousand, nine hundred one".