1377902787778 has 16 divisors (see below), whose sum is σ = 2286507061440. Its totient is φ = 617498047600.

The previous prime is 1377902787769. The next prime is 1377902787823. The reversal of 1377902787778 is 8777872097731.

It is a self number, because there is not a number n which added to its sum of digits gives 1377902787778.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 441068473 + ... + 441071596.

It is an arithmetic number, because the mean of its divisors is an integer number (142906691340).

Almost surely, 2^{1377902787778} is an apocalyptic number.

1377902787778 is a deficient number, since it is larger than the sum of its proper divisors (908604273662).

1377902787778 is a wasteful number, since it uses less digits than its factorization.

1377902787778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882140153.

The product of its (nonzero) digits is 406594944, while the sum is 73.

The spelling of 1377902787778 in words is "one trillion, three hundred seventy-seven billion, nine hundred two million, seven hundred eighty-seven thousand, seven hundred seventy-eight".