40154020521 has 16 divisors (see below), whose sum is σ = 54555360000. Its totient is φ = 26262834768.

The previous prime is 40154020483. The next prime is 40154020547. The reversal of 40154020521 is 12502045104.

It is not a de Polignac number, because 40154020521 - 2¹⁸ = 40153758377 is a prime.

It is a super-2 number, since 2×40154020521² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40154020491 and 40154020500.

It is not an unprimeable number, because it can be changed into a prime (40154020591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138991 + ... + 315636.

It is an arithmetic number, because the mean of its divisors is an integer number (3409710000).

Almost surely, 2^40154020521 is an apocalyptic number.

It is an amenable number.

40154020521 is a deficient number, since it is larger than the sum of its proper divisors (14401339479).

40154020521 is a wasteful number, since it uses less digits than its factorization.

40154020521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455188.

The product of its (nonzero) digits is 1600, while the sum is 24.

Adding to 40154020521 its reverse (12502045104), we get a palindrome (52656065625).

The spelling of 40154020521 in words is "forty billion, one hundred fifty-four million, twenty thousand, five hundred twenty-one".