1011961804378 has 48 divisors (see below), whose sum is σ = 1770802230600. Its totient is φ = 432463764096.

The previous prime is 1011961804349. The next prime is 1011961804391. The reversal of 1011961804378 is 8734081691101.

It can be written as a sum of positive squares in 4 ways, for example, as 1011961557369 + 247009 = 1005963^2 + 497^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50213848 + ... + 50233996.

Almost surely, 2^{1011961804378} is an apocalyptic number.

1011961804378 is a deficient number, since it is larger than the sum of its proper divisors (758840426222).

1011961804378 is a wasteful number, since it uses less digits than its factorization.

1011961804378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21599 (or 21592 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 49.

The spelling of 1011961804378 in words is "one trillion, eleven billion, nine hundred sixty-one million, eight hundred four thousand, three hundred seventy-eight".