61040243002421 has 16 divisors (see below), whose sum is σ = 61800832287936. Its totient is φ = 60280258066176.

The previous prime is 61040243002373. The next prime is 61040243002457. The reversal of 61040243002421 is 12420034204016.

It is not a de Polignac number, because 61040243002421 - 2¹⁸ = 61040242740277 is a prime.

It is a super-2 number, since 2×61040243002421² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61040243002471) 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, 4285623926 + ... + 4285638168.

It is an arithmetic number, because the mean of its divisors is an integer number (3862552017996).

Almost surely, 2^{61040243002421} is an apocalyptic number.

It is an amenable number.

61040243002421 is a deficient number, since it is larger than the sum of its proper divisors (760589285515).

61040243002421 is a wasteful number, since it uses less digits than its factorization.

61040243002421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31732.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 61040243002421 its reverse (12420034204016), we get a palindrome (73460277206437).

The spelling of 61040243002421 in words is "sixty-one trillion, forty billion, two hundred forty-three million, two thousand, four hundred twenty-one".