75400721429 has 4 divisors (see below), whose sum is σ = 82255332480. Its totient is φ = 68546110380.

The previous prime is 75400721353. The next prime is 75400721449. The reversal of 75400721429 is 92412700457.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 75400721429 - 2²⁴ = 75383944213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75400721449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3427305509 + ... + 3427305530.

It is an arithmetic number, because the mean of its divisors is an integer number (20563833120).

Almost surely, 2^75400721429 is an apocalyptic number.

It is an amenable number.

75400721429 is a deficient number, since it is larger than the sum of its proper divisors (6854611051).

75400721429 is a wasteful number, since it uses less digits than its factorization.

75400721429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6854611050.

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 75400721429 in words is "seventy-five billion, four hundred million, seven hundred twenty-one thousand, four hundred twenty-nine".