1553514993242 has 4 divisors (see below), whose sum is σ = 2330272489866. Its totient is φ = 776757496620.

The previous prime is 1553514993241. The next prime is 1553514993271. The reversal of 1553514993242 is 2423994153551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1291361777161 + 262153216081 = 1136381^2 + 512009^2 .

It is not an unprimeable number, because it can be changed into a prime (1553514993241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 388378748309 + ... + 388378748312.

Almost surely, 2^{1553514993242} is an apocalyptic number.

1553514993242 is a deficient number, since it is larger than the sum of its proper divisors (776757496624).

1553514993242 is an equidigital number, since it uses as much as digits as its factorization.

1553514993242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776757496623.

The product of its digits is 5832000, while the sum is 53.

The spelling of 1553514993242 in words is "one trillion, five hundred fifty-three billion, five hundred fourteen million, nine hundred ninety-three thousand, two hundred forty-two".