40721138754 has 16 divisors (see below), whose sum is σ = 81446569248. Its totient is φ = 13572997632.

The previous prime is 40721138749. The next prime is 40721138791. The reversal of 40721138754 is 45783112704.

It is a super-2 number, since 2×40721138754² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48127 + ... + 289410.

It is an arithmetic number, because the mean of its divisors is an integer number (5090410578).

Almost surely, 2^40721138754 is an apocalyptic number.

40721138754 is an abundant number, since it is smaller than the sum of its proper divisors (40725430494).

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

40721138754 is a wasteful number, since it uses less digits than its factorization.

40721138754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357649.

The product of its (nonzero) digits is 188160, while the sum is 42.

The spelling of 40721138754 in words is "forty billion, seven hundred twenty-one million, one hundred thirty-eight thousand, seven hundred fifty-four".