1400216556561 has 8 divisors (see below), whose sum is σ = 1867003317024. Its totient is φ = 933453750240.

The previous prime is 1400216556553. The next prime is 1400216556581. The reversal of 1400216556561 is 1656556120041.

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

It is not a de Polignac number, because 1400216556561 - 2³ = 1400216556553 is a prime.

It is a super-2 number, since 2×1400216556561² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1400216556581) 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, 5851695 + ... + 6086276.

It is an arithmetic number, because the mean of its divisors is an integer number (233375414628).

Almost surely, 2^{1400216556561} is an apocalyptic number.

It is an amenable number.

1400216556561 is a deficient number, since it is larger than the sum of its proper divisors (466786760463).

1400216556561 is a wasteful number, since it uses less digits than its factorization.

1400216556561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11977071.

The product of its (nonzero) digits is 216000, while the sum is 42.

The spelling of 1400216556561 in words is "one trillion, four hundred billion, two hundred sixteen million, five hundred fifty-six thousand, five hundred sixty-one".