40648642511 has 4 divisors (see below), whose sum is σ = 40958937624. Its totient is φ = 40338347400.

The previous prime is 40648642501. The next prime is 40648642549. The reversal of 40648642511 is 11524684604.

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

It is a cyclic number.

It is not a de Polignac number, because 40648642511 - 2¹⁰ = 40648641487 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 (40648642501) 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, 155147360 + ... + 155147621.

It is an arithmetic number, because the mean of its divisors is an integer number (10239734406).

Almost surely, 2^40648642511 is an apocalyptic number.

40648642511 is a deficient number, since it is larger than the sum of its proper divisors (310295113).

40648642511 is a wasteful number, since it uses less digits than its factorization.

40648642511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310295112.

The product of its (nonzero) digits is 184320, while the sum is 41.

The spelling of 40648642511 in words is "forty billion, six hundred forty-eight million, six hundred forty-two thousand, five hundred eleven".