40297472640 has 96 divisors (see below), whose sum is σ = 139152230100. Its totient is φ = 10745991168.

The previous prime is 40297472623. The next prime is 40297472641. The reversal of 40297472640 is 4627479204.

It can be written as a sum of positive squares in 2 ways, for example, as 36340559424 + 3956913216 = 190632^2 + 62904^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (40297472641) 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, 3492285 + ... + 3503804.

Almost surely, 2^40297472640 is an apocalyptic number.

40297472640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40297472640 is an abundant number, since it is smaller than the sum of its proper divisors (98854757460).

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

40297472640 is a wasteful number, since it uses less digits than its factorization.

40297472640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6996114 (or 6996099 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 45.

The spelling of 40297472640 in words is "forty billion, two hundred ninety-seven million, four hundred seventy-two thousand, six hundred forty".