1625138734 has 16 divisors (see below), whose sum is σ = 2475652608. Its totient is φ = 799936632.

The previous prime is 1625138719. The next prime is 1625138737. The reversal of 1625138734 is 4378315261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1625138737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 297859 + ... + 303265.

It is an arithmetic number, because the mean of its divisors is an integer number (154728288).

Almost surely, 2^1625138734 is an apocalyptic number.

1625138734 is a deficient number, since it is larger than the sum of its proper divisors (850513874).

1625138734 is a wasteful number, since it uses less digits than its factorization.

1625138734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7719.

The product of its digits is 120960, while the sum is 40.

The square root of 1625138734 is about 40313.0094882533. The cubic root of 1625138734 is about 1175.7008003510.

The spelling of 1625138734 in words is "one billion, six hundred twenty-five million, one hundred thirty-eight thousand, seven hundred thirty-four".