1151575501878 has 32 divisors (see below), whose sum is σ = 2570231618400. Its totient is φ = 382182258528.

The previous prime is 1151575501829. The next prime is 1151575501891. The reversal of 1151575501878 is 8781055751511.

1151575501878 is a `hidden beast` number, since 1 + 1 + 5 + 1 + 5 + 7 + 550 + 1 + 87 + 8 = 666.

It is a super-2 number, since 2×1151575501878² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46549801 + ... + 46574532.

It is an arithmetic number, because the mean of its divisors is an integer number (80319738075).

Almost surely, 2^{1151575501878} is an apocalyptic number.

1151575501878 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1151575501878 is an abundant number, since it is smaller than the sum of its proper divisors (1418656116522).

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

1151575501878 is a wasteful number, since it uses less digits than its factorization.

1151575501878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93124573 (or 93124567 counting only the distinct ones).

The product of its (nonzero) digits is 1960000, while the sum is 54.

The spelling of 1151575501878 in words is "one trillion, one hundred fifty-one billion, five hundred seventy-five million, five hundred one thousand, eight hundred seventy-eight".