1267040400461 has 4 divisors (see below), whose sum is σ = 1382225891424. Its totient is φ = 1151854909500.

The previous prime is 1267040400407. The next prime is 1267040400469. The reversal of 1267040400461 is 1640040407621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1267040400461 - 2¹⁸ = 1267040138317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1267040400469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57592745465 + ... + 57592745486.

It is an arithmetic number, because the mean of its divisors is an integer number (345556472856).

Almost surely, 2^{1267040400461} is an apocalyptic number.

1267040400461 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1267040400461 is a deficient number, since it is larger than the sum of its proper divisors (115185490963).

1267040400461 is a wasteful number, since it uses less digits than its factorization.

1267040400461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115185490962.

The product of its (nonzero) digits is 32256, while the sum is 35.

The spelling of 1267040400461 in words is "one trillion, two hundred sixty-seven billion, forty million, four hundred thousand, four hundred sixty-one".