37978440887 has 4 divisors (see below), whose sum is σ = 38028347616. Its totient is φ = 37928534160.

The previous prime is 37978440859. The next prime is 37978440893. The reversal of 37978440887 is 78804487973.

37978440887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 37978440887 - 2¹² = 37978436791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37978440847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24952223 + ... + 24953744.

It is an arithmetic number, because the mean of its divisors is an integer number (9507086904).

Almost surely, 2^37978440887 is an apocalyptic number.

37978440887 is a deficient number, since it is larger than the sum of its proper divisors (49906729).

37978440887 is an equidigital number, since it uses as much as digits as its factorization.

37978440887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49906728.

The product of its (nonzero) digits is 75866112, while the sum is 65.

The spelling of 37978440887 in words is "thirty-seven billion, nine hundred seventy-eight million, four hundred forty thousand, eight hundred eighty-seven".