1156201550 has 60 divisors (see below), whose sum is σ = 2509068576. Its totient is φ = 396370800.

The previous prime is 1156201531. The next prime is 1156201561. The reversal of 1156201550 is 551026511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 115235 + ... + 124865.

Almost surely, 2^1156201550 is an apocalyptic number.

1156201550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1156201550 is an abundant number, since it is smaller than the sum of its proper divisors (1352867026).

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

1156201550 is an frugal number, since it uses more digits than its factorization.

1156201550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9671 (or 9645 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 26.

The square root of 1156201550 is about 34002.9638414065. The cubic root of 1156201550 is about 1049.5694531103.

The spelling of 1156201550 in words is "one billion, one hundred fifty-six million, two hundred one thousand, five hundred fifty".