1651272465 has 16 divisors (see below), whose sum is σ = 2756907648. Its totient is φ = 842388096.

The previous prime is 1651272461. The next prime is 1651272487. The reversal of 1651272465 is 5642721561.

It is not a de Polignac number, because 1651272465 - 2² = 1651272461 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1651272461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2392804 + ... + 2393493.

It is an arithmetic number, because the mean of its divisors is an integer number (172306728).

Almost surely, 2^1651272465 is an apocalyptic number.

1651272465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1651272465 is a deficient number, since it is larger than the sum of its proper divisors (1105635183).

1651272465 is a wasteful number, since it uses less digits than its factorization.

1651272465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4786328.

The product of its digits is 100800, while the sum is 39.

The square root of 1651272465 is about 40635.8519659672. The cubic root of 1651272465 is about 1181.9694357092.

The spelling of 1651272465 in words is "one billion, six hundred fifty-one million, two hundred seventy-two thousand, four hundred sixty-five".