1151065557 has 24 divisors (see below), whose sum is σ = 1724506368. Its totient is φ = 739065600.

The previous prime is 1151065541. The next prime is 1151065571. The reversal of 1151065557 is 7555601511.

It is a happy number.

It is not a de Polignac number, because 1151065557 - 2⁴ = 1151065541 is a prime.

It is a super-3 number, since 3×1151065557³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151065507) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49093 + ... + 68645.

It is an arithmetic number, because the mean of its divisors is an integer number (71854432).

Almost surely, 2^1151065557 is an apocalyptic number.

It is an amenable number.

1151065557 is a deficient number, since it is larger than the sum of its proper divisors (573440811).

1151065557 is a wasteful number, since it uses less digits than its factorization.

1151065557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19801 (or 19798 counting only the distinct ones).

The product of its (nonzero) digits is 26250, while the sum is 36.

The square root of 1151065557 is about 33927.3570588692. The cubic root of 1151065557 is about 1048.0130396397.

The spelling of 1151065557 in words is "one billion, one hundred fifty-one million, sixty-five thousand, five hundred fifty-seven".