201878378537 has 8 divisors (see below), whose sum is σ = 220440515232. Its totient is φ = 183351168000.

The previous prime is 201878378521. The next prime is 201878378539. The reversal of 201878378537 is 735873878102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 201878378537 - 2⁴ = 201878378521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201878378539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8719448 + ... + 8742569.

It is an arithmetic number, because the mean of its divisors is an integer number (27555064404).

Almost surely, 2^201878378537 is an apocalyptic number.

It is an amenable number.

201878378537 is a deficient number, since it is larger than the sum of its proper divisors (18562136695).

201878378537 is a wasteful number, since it uses less digits than its factorization.

201878378537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17463079.

The product of its (nonzero) digits is 15805440, while the sum is 59.

The spelling of 201878378537 in words is "two hundred one billion, eight hundred seventy-eight million, three hundred seventy-eight thousand, five hundred thirty-seven".