40545664541461 has 4 divisors (see below), whose sum is σ = 40546852170124. Its totient is φ = 40544476912800.

The previous prime is 40545664541383. The next prime is 40545664541521. The reversal of 40545664541461 is 16414546654504.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16101480402225 + 24444184139236 = 4012665^2 + 4944106^2 .

It is a cyclic number.

It is not a de Polignac number, because 40545664541461 - 2¹⁵ = 40545664508693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40545664548461) 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, 593763120 + ... + 593831401.

It is an arithmetic number, because the mean of its divisors is an integer number (10136713042531).

Almost surely, 2^{40545664541461} is an apocalyptic number.

It is an amenable number.

40545664541461 is a deficient number, since it is larger than the sum of its proper divisors (1187628663).

40545664541461 is a wasteful number, since it uses less digits than its factorization.

40545664541461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187628662.

The product of its (nonzero) digits is 27648000, while the sum is 55.

The spelling of 40545664541461 in words is "forty trillion, five hundred forty-five billion, six hundred sixty-four million, five hundred forty-one thousand, four hundred sixty-one".