1401021553544 has 8 divisors (see below), whose sum is σ = 2626915412910. Its totient is φ = 700510776768.

The previous prime is 1401021553517. The next prime is 1401021553573. The reversal of 1401021553544 is 4453551201041.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1222709600644 + 178311952900 = 1105762^2 + 422270^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×1401021553544³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 87563847089 + ... + 87563847104.

Almost surely, 2^{1401021553544} is an apocalyptic number.

It is an amenable number.

1401021553544 is a deficient number, since it is larger than the sum of its proper divisors (1225893859366).

1401021553544 is a wasteful number, since it uses less digits than its factorization.

1401021553544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175127694199 (or 175127694195 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 35.

Adding to 1401021553544 its reverse (4453551201041), we get a palindrome (5854572754585).

The spelling of 1401021553544 in words is "one trillion, four hundred one billion, twenty-one million, five hundred fifty-three thousand, five hundred forty-four".