72177042105542 has 32 divisors (see below), whose sum is σ = 118476383460480. Its totient is φ = 32705431217280.

The previous prime is 72177042105541. The next prime is 72177042105583. The reversal of 72177042105542 is 24550124077127.

It is a super-2 number, since 2×72177042105542² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72177042105541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31087358 + ... + 33328334.

It is an arithmetic number, because the mean of its divisors is an integer number (3702386983140).

Almost surely, 2^{72177042105542} is an apocalyptic number.

72177042105542 is a deficient number, since it is larger than the sum of its proper divisors (46299341354938).

72177042105542 is a wasteful number, since it uses less digits than its factorization.

72177042105542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2245556.

The product of its (nonzero) digits is 1097600, while the sum is 47.

The spelling of 72177042105542 in words is "seventy-two trillion, one hundred seventy-seven billion, forty-two million, one hundred five thousand, five hundred forty-two".