40985347961 has 4 divisors (see below), whose sum is σ = 41938495632. Its totient is φ = 40032200292.

The previous prime is 40985347951. The next prime is 40985347981. The reversal of 40985347961 is 16974358904.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40985347961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40985347897 and 40985347906.

It is not an unprimeable number, because it can be changed into a prime (40985347951) 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, 476573771 + ... + 476573856.

It is an arithmetic number, because the mean of its divisors is an integer number (10484623908).

Almost surely, 2^40985347961 is an apocalyptic number.

It is an amenable number.

40985347961 is a deficient number, since it is larger than the sum of its proper divisors (953147671).

40985347961 is an equidigital number, since it uses as much as digits as its factorization.

40985347961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 953147670.

The product of its (nonzero) digits is 6531840, while the sum is 56.

The spelling of 40985347961 in words is "forty billion, nine hundred eighty-five million, three hundred forty-seven thousand, nine hundred sixty-one".