40770209650861 has 4 divisors (see below), whose sum is σ = 42542827461792. Its totient is φ = 38997591839932.

The previous prime is 40770209650829. The next prime is 40770209650867. The reversal of 40770209650861 is 16805690207704.

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 not a de Polignac number, because 40770209650861 - 2⁵ = 40770209650829 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 (40770209650867) 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, 886308905431 + ... + 886308905476.

It is an arithmetic number, because the mean of its divisors is an integer number (10635706865448).

Almost surely, 2^{40770209650861} is an apocalyptic number.

It is an amenable number.

40770209650861 is a deficient number, since it is larger than the sum of its proper divisors (1772617810931).

40770209650861 is a wasteful number, since it uses less digits than its factorization.

40770209650861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1772617810930.

The product of its (nonzero) digits is 5080320, while the sum is 55.

The spelling of 40770209650861 in words is "forty trillion, seven hundred seventy billion, two hundred nine million, six hundred fifty thousand, eight hundred sixty-one".