42780011755 has 32 divisors (see below), whose sum is σ = 56383024320. Its totient is φ = 30966988800.

The previous prime is 42780011737. The next prime is 42780011783. The reversal of 42780011755 is 55711008724.

It is not a de Polignac number, because 42780011755 - 2¹¹ = 42780009707 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1337955 + ... + 1369555.

It is an arithmetic number, because the mean of its divisors is an integer number (1761969510).

Almost surely, 2^42780011755 is an apocalyptic number.

42780011755 is a deficient number, since it is larger than the sum of its proper divisors (13603012565).

42780011755 is a wasteful number, since it uses less digits than its factorization.

42780011755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32031.

The product of its (nonzero) digits is 78400, while the sum is 40.

The spelling of 42780011755 in words is "forty-two billion, seven hundred eighty million, eleven thousand, seven hundred fifty-five".