40461956397 has 12 divisors (see below), whose sum is σ = 58629421500. Its totient is φ = 26889542208.

The previous prime is 40461956333. The next prime is 40461956441. The reversal of 40461956397 is 79365916404.

40461956397 is a `hidden beast` number, since 4 + 0 + 461 + 95 + 6 + 3 + 97 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6728756841 + 33733199556 = 82029^2 + 183666^2 .

It is not a de Polignac number, because 40461956397 - 2⁶ = 40461956333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40411956397) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7088272 + ... + 7093977.

It is an arithmetic number, because the mean of its divisors is an integer number (4885785125).

Almost surely, 2^40461956397 is an apocalyptic number.

It is an amenable number.

40461956397 is a deficient number, since it is larger than the sum of its proper divisors (18167465103).

40461956397 is a wasteful number, since it uses less digits than its factorization.

40461956397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14182572 (or 14182569 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 54.

The spelling of 40461956397 in words is "forty billion, four hundred sixty-one million, nine hundred fifty-six thousand, three hundred ninety-seven".