72774151 has 4 divisors (see below), whose sum is σ = 73651032. Its totient is φ = 71897272.

The previous prime is 72774131. The next prime is 72774167. The reversal of 72774151 is 15147727.

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

It is a cyclic number.

It is not a de Polignac number, because 72774151 - 2¹⁷ = 72643079 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 (72774131) 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, 438316 + ... + 438481.

It is an arithmetic number, because the mean of its divisors is an integer number (18412758).

Almost surely, 2^72774151 is an apocalyptic number.

72774151 is a deficient number, since it is larger than the sum of its proper divisors (876881).

72774151 is an equidigital number, since it uses as much as digits as its factorization.

72774151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876880.

The product of its digits is 13720, while the sum is 34.

The square root of 72774151 is about 8530.7766938304. The cubic root of 72774151 is about 417.5024700154.

The spelling of 72774151 in words is "seventy-two million, seven hundred seventy-four thousand, one hundred fifty-one".