1353721554 has 12 divisors (see below), whose sum is σ = 2933063406. Its totient is φ = 451240512.

The previous prime is 1353721549. The next prime is 1353721561. The reversal of 1353721554 is 4551273531.

1353721554 is a `hidden beast` number, since 1 + 35 + 3 + 72 + 1 + 554 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1305738225 + 47983329 = 36135^2 + 6927^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37603359 + ... + 37603394.

Almost surely, 2^1353721554 is an apocalyptic number.

1353721554 is an abundant number, since it is smaller than the sum of its proper divisors (1579341852).

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

1353721554 is a wasteful number, since it uses less digits than its factorization.

1353721554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75206761 (or 75206758 counting only the distinct ones).

The product of its digits is 63000, while the sum is 36.

The square root of 1353721554 is about 36792.9552224335. The cubic root of 1353721554 is about 1106.2240972198.

The spelling of 1353721554 in words is "one billion, three hundred fifty-three million, seven hundred twenty-one thousand, five hundred fifty-four".