1206642620761 has 4 divisors (see below), whose sum is σ = 1206645672400. Its totient is φ = 1206639569124.

The previous prime is 1206642620749. The next prime is 1206642620791. The reversal of 1206642620761 is 1670262466021.

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 1206642620761 - 2²¹ = 1206640523609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1206642620791) 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, 825591 + ... + 1759228.

It is an arithmetic number, because the mean of its divisors is an integer number (301661418100).

Almost surely, 2^{1206642620761} is an apocalyptic number.

It is an amenable number.

1206642620761 is a deficient number, since it is larger than the sum of its proper divisors (3051639).

1206642620761 is an equidigital number, since it uses as much as digits as its factorization.

1206642620761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3051638.

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 1206642620761 in words is "one trillion, two hundred six billion, six hundred forty-two million, six hundred twenty thousand, seven hundred sixty-one".