1157781550 has 24 divisors (see below), whose sum is σ = 2199296736. Its totient is φ = 453258240.

The previous prime is 1157781497. The next prime is 1157781553. The reversal of 1157781550 is 551877511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157781553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 243987 + ... + 248686.

It is an arithmetic number, because the mean of its divisors is an integer number (91637364).

Almost surely, 2^1157781550 is an apocalyptic number.

1157781550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1157781550 is a deficient number, since it is larger than the sum of its proper divisors (1041515186).

1157781550 is a wasteful number, since it uses less digits than its factorization.

1157781550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492732 (or 492727 counting only the distinct ones).

The product of its (nonzero) digits is 49000, while the sum is 40.

The square root of 1157781550 is about 34026.1891783373. The cubic root of 1157781550 is about 1050.0473296882.

The spelling of 1157781550 in words is "one billion, one hundred fifty-seven million, seven hundred eighty-one thousand, five hundred fifty".