1901511495864 has 48 divisors (see below), whose sum is σ = 5174334246120. Its totient is φ = 630833192640.

The previous prime is 1901511495857. The next prime is 1901511495887. The reversal of 1901511495864 is 4685941151091.

1901511495864 is a `hidden beast` number, since 1 + 9 + 0 + 1 + 5 + 11 + 49 + 586 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1901511495864.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62567467 + ... + 62597850.

Almost surely, 2^{1901511495864} is an apocalyptic number.

It is an amenable number.

1901511495864 is an abundant number, since it is smaller than the sum of its proper divisors (3272822750256).

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

1901511495864 is a wasteful number, since it uses less digits than its factorization.

1901511495864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125165540 (or 125165533 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 54.

The spelling of 1901511495864 in words is "one trillion, nine hundred one billion, five hundred eleven million, four hundred ninety-five thousand, eight hundred sixty-four".