1640015642351 has 4 divisors (see below), whose sum is σ = 1640336025600. Its totient is φ = 1639695259104.

The previous prime is 1640015642347. The next prime is 1640015642371. The reversal of 1640015642351 is 1532465100461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1640015642351 - 2² = 1640015642347 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 (1640015642371) 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, 160183946 + ... + 160194183.

It is an arithmetic number, because the mean of its divisors is an integer number (410084006400).

Almost surely, 2^{1640015642351} is an apocalyptic number.

1640015642351 is a deficient number, since it is larger than the sum of its proper divisors (320383249).

1640015642351 is an equidigital number, since it uses as much as digits as its factorization.

1640015642351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320383248.

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 1640015642351 in words is "one trillion, six hundred forty billion, fifteen million, six hundred forty-two thousand, three hundred fifty-one".