1406263641 has 16 divisors (see below), whose sum is σ = 1916140800. Its totient is φ = 916973568.

The previous prime is 1406263597. The next prime is 1406263687. The reversal of 1406263641 is 1463626041.

It is not a de Polignac number, because 1406263641 - 2⁶ = 1406263577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1406264641) 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, 377295 + ... + 381003.

It is an arithmetic number, because the mean of its divisors is an integer number (119758800).

Almost surely, 2^1406263641 is an apocalyptic number.

It is an amenable number.

1406263641 is a deficient number, since it is larger than the sum of its proper divisors (509877159).

1406263641 is a wasteful number, since it uses less digits than its factorization.

1406263641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6448.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 1406263641 is about 37500.1818795589. The cubic root of 1406263641 is about 1120.3548091960.

Adding to 1406263641 its reverse (1463626041), we get a palindrome (2869889682).

The spelling of 1406263641 in words is "one billion, four hundred six million, two hundred sixty-three thousand, six hundred forty-one".