1901377555387 has 2 divisors, whose sum is σ = 1901377555388. Its totient is φ = 1901377555386.

The previous prime is 1901377555279. The next prime is 1901377555463. The reversal of 1901377555387 is 7835557731091.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1901377555387 is a prime.

It is not a weakly prime, because it can be changed into another prime (1901377559387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 950688777693 + 950688777694.

It is an arithmetic number, because the mean of its divisors is an integer number (950688777694).

Almost surely, 2^{1901377555387} is an apocalyptic number.

1901377555387 is a deficient number, since it is larger than the sum of its proper divisors (1).

1901377555387 is an equidigital number, since it uses as much as digits as its factorization.

1901377555387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27783000, while the sum is 61.

The spelling of 1901377555387 in words is "one trillion, nine hundred one billion, three hundred seventy-seven million, five hundred fifty-five thousand, three hundred eighty-seven".