961997581148 has 6 divisors (see below), whose sum is σ = 1683495767016. Its totient is φ = 480998790572.

The previous prime is 961997581091. The next prime is 961997581159. The reversal of 961997581148 is 841185799169.

It is a super-2 number, since 2×961997581148² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120249697640 + ... + 120249697647.

It is an arithmetic number, because the mean of its divisors is an integer number (280582627836).

Almost surely, 2^961997581148 is an apocalyptic number.

It is an amenable number.

961997581148 is a deficient number, since it is larger than the sum of its proper divisors (721498185868).

961997581148 is a wasteful number, since it uses less digits than its factorization.

961997581148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240499395291 (or 240499395289 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 68.

The spelling of 961997581148 in words is "nine hundred sixty-one billion, nine hundred ninety-seven million, five hundred eighty-one thousand, one hundred forty-eight".