1553645122 has 16 divisors (see below), whose sum is σ = 2339020800. Its totient is φ = 773977600.

The previous prime is 1553645089. The next prime is 1553645123. The reversal of 1553645122 is 2215463551.

It is a super-2 number, since 2×1553645122² = 4827626330228789768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1553645123) 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, 1101954 + ... + 1103362.

It is an arithmetic number, because the mean of its divisors is an integer number (146188800).

Almost surely, 2^1553645122 is an apocalyptic number.

1553645122 is a deficient number, since it is larger than the sum of its proper divisors (785375678).

1553645122 is a wasteful number, since it uses less digits than its factorization.

1553645122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3041.

The product of its digits is 36000, while the sum is 34.

The square root of 1553645122 is about 39416.3052809367. The cubic root of 1553645122 is about 1158.2010169836.

The spelling of 1553645122 in words is "one billion, five hundred fifty-three million, six hundred forty-five thousand, one hundred twenty-two".