40254661251531 has 6 divisors (see below), whose sum is σ = 58145621807780. Its totient is φ = 26836440834348.

The previous prime is 40254661251503. The next prime is 40254661251577. The reversal of 40254661251531 is 13515216645204.

40254661251531 is a `hidden beast` number, since 4 + 0 + 2 + 5 + 4 + 6 + 61 + 2 + 51 + 531 = 666.

It is not a de Polignac number, because 40254661251531 - 2¹⁴ = 40254661235147 is a prime.

It is a super-2 number, since 2×40254661251531² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40254661251031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2236370069521 + ... + 2236370069538.

Almost surely, 2^{40254661251531} is an apocalyptic number.

40254661251531 is a deficient number, since it is larger than the sum of its proper divisors (17890960556249).

40254661251531 is a wasteful number, since it uses less digits than its factorization.

40254661251531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4472740139065 (or 4472740139062 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 45.

Adding to 40254661251531 its reverse (13515216645204), we get a palindrome (53769877896735).

The spelling of 40254661251531 in words is "forty trillion, two hundred fifty-four billion, six hundred sixty-one million, two hundred fifty-one thousand, five hundred thirty-one".