40012453444 has 72 divisors (see below), whose sum is σ = 75279040200. Its totient is φ = 18604068864.

The previous prime is 40012453391. The next prime is 40012453463. The reversal of 40012453444 is 44435421004.

It can be written as a sum of positive squares in 12 ways, for example, as 2903054400 + 37109399044 = 53880^2 + 192638^2 .

It is a super-2 number, since 2×40012453444² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40132354 + ... + 40133350.

It is an arithmetic number, because the mean of its divisors is an integer number (1045542225).

Almost surely, 2^40012453444 is an apocalyptic number.

It is an amenable number.

40012453444 is a deficient number, since it is larger than the sum of its proper divisors (35266586756).

40012453444 is a wasteful number, since it uses less digits than its factorization.

40012453444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417 (or 1398 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 31.

Adding to 40012453444 its reverse (44435421004), we get a palindrome (84447874448).

The spelling of 40012453444 in words is "forty billion, twelve million, four hundred fifty-three thousand, four hundred forty-four".