72974259506 has 4 divisors (see below), whose sum is σ = 109461389262. Its totient is φ = 36487129752.

The previous prime is 72974259473. The next prime is 72974259509. The reversal of 72974259506 is 60595247927.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 69203194225 + 3771065281 = 263065^2 + 61409^2 .

It is not an unprimeable number, because it can be changed into a prime (72974259509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18243564875 + ... + 18243564878.

Almost surely, 2^72974259506 is an apocalyptic number.

72974259506 is a deficient number, since it is larger than the sum of its proper divisors (36487129756).

72974259506 is a wasteful number, since it uses less digits than its factorization.

72974259506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36487129755.

The product of its (nonzero) digits is 9525600, while the sum is 56.

The spelling of 72974259506 in words is "seventy-two billion, nine hundred seventy-four million, two hundred fifty-nine thousand, five hundred six".