40661164546 has 16 divisors (see below), whose sum is σ = 61088230368. Its totient is φ = 20298448800.

The previous prime is 40661164543. The next prime is 40661164547. The reversal of 40661164546 is 64546116604.

It is a happy number.

It is a super-2 number, since 2×40661164546² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40661164543) 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, 3647401 + ... + 3658531.

It is an arithmetic number, because the mean of its divisors is an integer number (3818014398).

Almost surely, 2^40661164546 is an apocalyptic number.

40661164546 is a deficient number, since it is larger than the sum of its proper divisors (20427065822).

40661164546 is a wasteful number, since it uses less digits than its factorization.

40661164546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13857.

The product of its (nonzero) digits is 414720, while the sum is 43.

The spelling of 40661164546 in words is "forty billion, six hundred sixty-one million, one hundred sixty-four thousand, five hundred forty-six".