1553640463551 has 36 divisors (see below), whose sum is σ = 2418778462856. Its totient is φ = 886211969280.

The previous prime is 1553640463537. The next prime is 1553640463589.

1553640463551 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1553640463551 - 2⁷ = 1553640463423 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1553640463551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1553640463511) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7299940 + ... + 7509753.

Almost surely, 2^{1553640463551} is an apocalyptic number.

1553640463551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1553640463551 is a deficient number, since it is larger than the sum of its proper divisors (865137999305).

1553640463551 is a wasteful number, since it uses less digits than its factorization.

1553640463551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14809752 (or 14809724 counting only the distinct ones).

The product of its (nonzero) digits is 3240000, while the sum is 48.

The spelling of 1553640463551 in words is "one trillion, five hundred fifty-three billion, six hundred forty million, four hundred sixty-three thousand, five hundred fifty-one".