7777240137742 has 48 divisors (see below), whose sum is σ = 12303600769152. Its totient is φ = 3686592839600.

The previous prime is 7777240137739. The next prime is 7777240137749. The reversal of 7777240137742 is 2477310427777.

It is a hoax number, since the sum of its digits (58) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7777240137749) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61246617 + ... + 61373467.

It is an arithmetic number, because the mean of its divisors is an integer number (256325016024).

Almost surely, 2^{7777240137742} is an apocalyptic number.

7777240137742 is a deficient number, since it is larger than the sum of its proper divisors (4526360631410).

7777240137742 is a wasteful number, since it uses less digits than its factorization.

7777240137742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127413 (or 127390 counting only the distinct ones).

The product of its (nonzero) digits is 22588608, while the sum is 58.

The spelling of 7777240137742 in words is "seven trillion, seven hundred seventy-seven billion, two hundred forty million, one hundred thirty-seven thousand, seven hundred forty-two".