1553400402 has 16 divisors (see below), whose sum is σ = 3137562432. Its totient is φ = 512673200.

The previous prime is 1553400391. The next prime is 1553400403. The reversal of 1553400402 is 2040043551.

It is not an unprimeable number, because it can be changed into a prime (1553400403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1281078 + ... + 1282289.

It is an arithmetic number, because the mean of its divisors is an integer number (196097652).

Almost surely, 2^1553400402 is an apocalyptic number.

1553400402 is an abundant number, since it is smaller than the sum of its proper divisors (1584162030).

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

1553400402 is a wasteful number, since it uses less digits than its factorization.

1553400402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2563473.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 1553400402 is about 39413.2008596105. The cubic root of 1553400402 is about 1158.1402030453.

Adding to 1553400402 its reverse (2040043551), we get a palindrome (3593443953).

The spelling of 1553400402 in words is "one billion, five hundred fifty-three million, four hundred thousand, four hundred two".