387491540191 has 32 divisors (see below), whose sum is σ = 474192427520. Its totient is φ = 309238300800.

The previous prime is 387491539973. The next prime is 387491540207. The reversal of 387491540191 is 191045194783.

It is a cyclic number.

It is not a de Polignac number, because 387491540191 - 2¹¹ = 387491538143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387491544191) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10016476 + ... + 10055086.

It is an arithmetic number, because the mean of its divisors is an integer number (14818513360).

Almost surely, 2^387491540191 is an apocalyptic number.

387491540191 is a deficient number, since it is larger than the sum of its proper divisors (86700887329).

387491540191 is a wasteful number, since it uses less digits than its factorization.

387491540191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39935.

The product of its (nonzero) digits is 1088640, while the sum is 52.

The spelling of 387491540191 in words is "three hundred eighty-seven billion, four hundred ninety-one million, five hundred forty thousand, one hundred ninety-one".