74762921821 has 16 divisors (see below), whose sum is σ = 86725004800. Its totient is φ = 63125008128.

The previous prime is 74762921819. The next prime is 74762921873. The reversal of 74762921821 is 12812926747.

It is not a de Polignac number, because 74762921821 - 2¹ = 74762921819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74762922821) 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, 83335 + ... + 395563.

It is an arithmetic number, because the mean of its divisors is an integer number (5420312800).

Almost surely, 2^74762921821 is an apocalyptic number.

It is an amenable number.

74762921821 is a deficient number, since it is larger than the sum of its proper divisors (11962082979).

74762921821 is a wasteful number, since it uses less digits than its factorization.

74762921821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312748.

The product of its digits is 677376, while the sum is 49.

The spelling of 74762921821 in words is "seventy-four billion, seven hundred sixty-two million, nine hundred twenty-one thousand, eight hundred twenty-one".