649758040801 has 4 divisors (see below), whose sum is σ = 649765199104. Its totient is φ = 649750882500.

The previous prime is 649758040793. The next prime is 649758040843. The reversal of 649758040801 is 108040857946.

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 649758040801 - 2³ = 649758040793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649758040861) 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, 3441225 + ... + 3625126.

It is an arithmetic number, because the mean of its divisors is an integer number (162441299776).

Almost surely, 2^649758040801 is an apocalyptic number.

It is an amenable number.

649758040801 is a deficient number, since it is larger than the sum of its proper divisors (7158303).

649758040801 is an equidigital number, since it uses as much as digits as its factorization.

649758040801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7158302.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 649758040801 in words is "six hundred forty-nine billion, seven hundred fifty-eight million, forty thousand, eight hundred one".