40320137961 has 80 divisors (see below), whose sum is σ = 62793470784. Its totient is φ = 25764189696.

The previous prime is 40320137903. The next prime is 40320137981. The reversal of 40320137961 is 16973102304.

40320137961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40320137961 - 2¹⁹ = 40319613673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40320137981) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 88227645 + ... + 88228101.

Almost surely, 2^40320137961 is an apocalyptic number.

It is an amenable number.

40320137961 is a deficient number, since it is larger than the sum of its proper divisors (22473332823).

40320137961 is a wasteful number, since it uses less digits than its factorization.

40320137961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 932 (or 923 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The spelling of 40320137961 in words is "forty billion, three hundred twenty million, one hundred thirty-seven thousand, nine hundred sixty-one".