74542155506 has 32 divisors (see below), whose sum is σ = 137879591808. Its totient is φ = 29432782080.

The previous prime is 74542155481. The next prime is 74542155539. The reversal of 74542155506 is 60555124547.

It is a super-2 number, since 2×74542155506² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 296375 + ... + 486746.

It is an arithmetic number, because the mean of its divisors is an integer number (4308737244).

Almost surely, 2^74542155506 is an apocalyptic number.

74542155506 is a deficient number, since it is larger than the sum of its proper divisors (63337436302).

74542155506 is a wasteful number, since it uses less digits than its factorization.

74542155506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783666.

The product of its (nonzero) digits is 840000, while the sum is 44.

The spelling of 74542155506 in words is "seventy-four billion, five hundred forty-two million, one hundred fifty-five thousand, five hundred six".