40697997184 has 64 divisors (see below), whose sum is σ = 87871523040. Its totient is φ = 18663929856.

The previous prime is 40697997181. The next prime is 40697997187. The reversal of 40697997184 is 48179979604.

It is an interprime number because it is at equal distance from previous prime (40697997181) and next prime (40697997187).

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40697997181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 183357 + ... + 339139.

Almost surely, 2^40697997184 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40697997184, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43935761520).

40697997184 is an abundant number, since it is smaller than the sum of its proper divisors (47173525856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40697997184 is a wasteful number, since it uses less digits than its factorization.

40697997184 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155967 (or 155955 counting only the distinct ones).

The product of its (nonzero) digits is 27433728, while the sum is 64.

The spelling of 40697997184 in words is "forty billion, six hundred ninety-seven million, nine hundred ninety-seven thousand, one hundred eighty-four".