1553402422044 has 72 divisors (see below), whose sum is σ = 4287922465008. Its totient is φ = 470255742720.

The previous prime is 1553402422031. The next prime is 1553402422093. The reversal of 1553402422044 is 4402242043551.

1553402422044 is a `hidden beast` number, since 1 + 5 + 5 + 3 + 402 + 42 + 204 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1572457 + ... + 2362080.

Almost surely, 2^{1553402422044} is an apocalyptic number.

It is an amenable number.

1553402422044 is an abundant number, since it is smaller than the sum of its proper divisors (2734520042964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1553402422044 is a wasteful number, since it uses less digits than its factorization.

1553402422044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3935555 (or 3935550 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 36.

Adding to 1553402422044 its reverse (4402242043551), we get a palindrome (5955644465595).

The spelling of 1553402422044 in words is "one trillion, five hundred fifty-three billion, four hundred two million, four hundred twenty-two thousand, forty-four".