742578432397 has 4 divisors (see below), whose sum is σ = 743998276960. Its totient is φ = 741158587836.

The previous prime is 742578432371. The next prime is 742578432457. The reversal of 742578432397 is 793234875247.

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 a cyclic number.

It is not a de Polignac number, because 742578432397 - 2⁷ = 742578432269 is a prime.

It is a super-2 number, since 2×742578432397² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742578432307) 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, 709921497 + ... + 709922542.

It is an arithmetic number, because the mean of its divisors is an integer number (185999569240).

Almost surely, 2^742578432397 is an apocalyptic number.

It is an amenable number.

742578432397 is a deficient number, since it is larger than the sum of its proper divisors (1419844563).

742578432397 is a wasteful number, since it uses less digits than its factorization.

742578432397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1419844562.

The product of its digits is 71124480, while the sum is 61.

The spelling of 742578432397 in words is "seven hundred forty-two billion, five hundred seventy-eight million, four hundred thirty-two thousand, three hundred ninety-seven".