1553455340 has 24 divisors (see below), whose sum is σ = 3283041552. Its totient is φ = 617423040.

The previous prime is 1553455339. The next prime is 1553455349. The reversal of 1553455340 is 435543551.

It is a self number, because there is not a number n which added to its sum of digits gives 1553455340.

It is not an unprimeable number, because it can be changed into a prime (1553455349) 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, 244226 + ... + 250505.

It is an arithmetic number, because the mean of its divisors is an integer number (136793398).

Almost surely, 2^1553455340 is an apocalyptic number.

1553455340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1553455340 is an abundant number, since it is smaller than the sum of its proper divisors (1729586212).

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

1553455340 is a wasteful number, since it uses less digits than its factorization.

1553455340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494897 (or 494895 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 35.

The square root of 1553455340 is about 39413.8978026787. The cubic root of 1553455340 is about 1158.1538559228.

Adding to 1553455340 its reverse (435543551), we get a palindrome (1988998891).

The spelling of 1553455340 in words is "one billion, five hundred fifty-three million, four hundred fifty-five thousand, three hundred forty".