961448551 has 8 divisors (see below), whose sum is σ = 1121223200. Its totient is φ = 824098464.

The previous prime is 961448489. The next prime is 961448569. The reversal of 961448551 is 155844169.

It is a de Polignac number, because none of the positive numbers 2^k-961448551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 961448498 and 961448507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961448581) 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, 1401186 + ... + 1401871.

It is an arithmetic number, because the mean of its divisors is an integer number (140152900).

Almost surely, 2^961448551 is an apocalyptic number.

961448551 is a deficient number, since it is larger than the sum of its proper divisors (159774649).

961448551 is an equidigital number, since it uses as much as digits as its factorization.

961448551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2803078 (or 2803064 counting only the distinct ones).

The product of its digits is 172800, while the sum is 43.

The square root of 961448551 is about 31007.2338495390. The cubic root of 961448551 is about 986.9807517665.

The spelling of 961448551 in words is "nine hundred sixty-one million, four hundred forty-eight thousand, five hundred fifty-one".