194150778552 has 80 divisors (see below), whose sum is σ = 546136287840. Its totient is φ = 64439121024.

The previous prime is 194150778541. The next prime is 194150778587. The reversal of 194150778552 is 255877051491.

194150778552 is a `hidden beast` number, since 1 + 9 + 4 + 1 + 507 + 7 + 85 + 52 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

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 19 ways as a sum of consecutive naturals, for example, 491968 + ... + 793935.

It is an arithmetic number, because the mean of its divisors is an integer number (6826703598).

Almost surely, 2^194150778552 is an apocalyptic number.

194150778552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

194150778552 is an abundant number, since it is smaller than the sum of its proper divisors (351985509288).

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

194150778552 is a wasteful number, since it uses less digits than its factorization.

194150778552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286154 (or 1286141 counting only the distinct ones).

The product of its (nonzero) digits is 3528000, while the sum is 54.

The spelling of 194150778552 in words is "one hundred ninety-four billion, one hundred fifty million, seven hundred seventy-eight thousand, five hundred fifty-two".