1400440640621 has 8 divisors (see below), whose sum is σ = 1617621274944. Its totient is φ = 1198237981120.

The previous prime is 1400440640593. The next prime is 1400440640639. The reversal of 1400440640621 is 1260460440041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1400440640621 - 2¹⁰ = 1400440639597 is a prime.

It is a super-2 number, since 2×1400440640621² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400440642621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3744493505 + ... + 3744493878.

It is an arithmetic number, because the mean of its divisors is an integer number (202202659368).

Almost surely, 2^{1400440640621} is an apocalyptic number.

1400440640621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1400440640621 is a deficient number, since it is larger than the sum of its proper divisors (217180634323).

1400440640621 is a wasteful number, since it uses less digits than its factorization.

1400440640621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7488987411.

The product of its (nonzero) digits is 18432, while the sum is 32.

The spelling of 1400440640621 in words is "one trillion, four hundred billion, four hundred forty million, six hundred forty thousand, six hundred twenty-one".