40121054246451 has 4 divisors (see below), whose sum is σ = 53494738995272. Its totient is φ = 26747369497632.

The previous prime is 40121054246407. The next prime is 40121054246459. The reversal of 40121054246451 is 15464245012104.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 40121054246451 - 2¹⁵ = 40121054213683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40121054246459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6686842374406 + ... + 6686842374411.

It is an arithmetic number, because the mean of its divisors is an integer number (13373684748818).

Almost surely, 2^{40121054246451} is an apocalyptic number.

40121054246451 is a deficient number, since it is larger than the sum of its proper divisors (13373684748821).

40121054246451 is a wasteful number, since it uses less digits than its factorization.

40121054246451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13373684748820.

The product of its (nonzero) digits is 153600, while the sum is 39.

Adding to 40121054246451 its reverse (15464245012104), we get a palindrome (55585299258555).

The spelling of 40121054246451 in words is "forty trillion, one hundred twenty-one billion, fifty-four million, two hundred forty-six thousand, four hundred fifty-one".