40178748197 has 12 divisors (see below), whose sum is σ = 46872485100. Its totient is φ = 34340233536.

The previous prime is 40178748193. The next prime is 40178748223. The reversal of 40178748197 is 79184787104.

40178748197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 15078366436 + 25100381761 = 122794^2 + 158431^2 .

It is not a de Polignac number, because 40178748197 - 2² = 40178748193 is a prime.

It is a super-2 number, since 2×40178748197² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40178748191) 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, 1157648 + ... + 1191849.

It is an arithmetic number, because the mean of its divisors is an integer number (3906040425).

Almost surely, 2^40178748197 is an apocalyptic number.

It is an amenable number.

40178748197 is a deficient number, since it is larger than the sum of its proper divisors (6693736903).

40178748197 is a wasteful number, since it uses less digits than its factorization.

40178748197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2349860 (or 2349853 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 56.

The spelling of 40178748197 in words is "forty billion, one hundred seventy-eight million, seven hundred forty-eight thousand, one hundred ninety-seven".