1651415493 has 48 divisors (see below), whose sum is σ = 2778699840. Its totient is φ = 864670464.

The previous prime is 1651415459. The next prime is 1651415497. The reversal of 1651415493 is 3945141561.

It is not a de Polignac number, because 1651415493 - 2¹⁶ = 1651349957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1651415497) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 262521 + ... + 268737.

It is an arithmetic number, because the mean of its divisors is an integer number (57889580).

Almost surely, 2^1651415493 is an apocalyptic number.

1651415493 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1651415493 is a deficient number, since it is larger than the sum of its proper divisors (1127284347).

1651415493 is a wasteful number, since it uses less digits than its factorization.

1651415493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6386 (or 6379 counting only the distinct ones).

The product of its digits is 64800, while the sum is 39.

The square root of 1651415493 is about 40637.6118023685. The cubic root of 1651415493 is about 1182.0035608758.

The spelling of 1651415493 in words is "one billion, six hundred fifty-one million, four hundred fifteen thousand, four hundred ninety-three".