772151645 has 30 divisors (see below), whose sum is σ = 1007920278. Its totient is φ = 567864192.

The previous prime is 772151599. The next prime is 772151657. The reversal of 772151645 is 546151277.

It can be written as a sum of positive squares in 5 ways, for example, as 12432676 + 759718969 = 3526^2 + 27563^2 .

It is not a de Polignac number, because 772151645 - 2⁶ = 772151581 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 772151599 and 772151608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 17956994 + ... + 17957036.

Almost surely, 2^772151645 is an apocalyptic number.

It is an amenable number.

772151645 is a deficient number, since it is larger than the sum of its proper divisors (235768633).

772151645 is an frugal number, since it uses more digits than its factorization.

772151645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159 (or 65 counting only the distinct ones).

The product of its digits is 58800, while the sum is 38.

The square root of 772151645 is about 27787.6167563899. The cubic root of 772151645 is about 917.4185847419.

The spelling of 772151645 in words is "seven hundred seventy-two million, one hundred fifty-one thousand, six hundred forty-five".