97781036542 has 96 divisors (see below), whose sum is σ = 180769577472. Its totient is φ = 39506092416.

The previous prime is 97781036527. The next prime is 97781036569. The reversal of 97781036542 is 24563018779.

It is a Cunningham number, because it is equal to 4607³-1.

It is a super-2 number, since 2×97781036542² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 97781036542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14454853 + ... + 14461615.

It is an arithmetic number, because the mean of its divisors is an integer number (1883016432).

It is a 2-persistent number, because it is pandigital, and so is 2⋅97781036542 = 195562073084, but 3⋅97781036542 = 293343109626 is not.

Almost surely, 2^97781036542 is an apocalyptic number.

97781036542 is a deficient number, since it is larger than the sum of its proper divisors (82988540930).

97781036542 is a wasteful number, since it uses less digits than its factorization.

97781036542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6942 (or 6935 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 52.

The spelling of 97781036542 in words is "ninety-seven billion, seven hundred eighty-one million, thirty-six thousand, five hundred forty-two".