961312078081 has 4 divisors (see below), whose sum is σ = 961371190192. Its totient is φ = 961252965972.

The previous prime is 961312078073. The next prime is 961312078087. The reversal of 961312078081 is 180870213169.

It is a happy number.

961312078081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 180870213169 = 73 ⋅2477674153.

It is a cyclic number.

It is not a de Polignac number, because 961312078081 - 2³ = 961312078073 is a prime.

It is a super-2 number, since 2×961312078081² (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 (961312078087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29531655 + ... + 29564188.

It is an arithmetic number, because the mean of its divisors is an integer number (240342797548).

Almost surely, 2^961312078081 is an apocalyptic number.

It is an amenable number.

961312078081 is a deficient number, since it is larger than the sum of its proper divisors (59112111).

961312078081 is a wasteful number, since it uses less digits than its factorization.

961312078081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59112110.

The product of its (nonzero) digits is 145152, while the sum is 46.

The spelling of 961312078081 in words is "nine hundred sixty-one billion, three hundred twelve million, seventy-eight thousand, eighty-one".