1625754642 has 32 divisors (see below), whose sum is σ = 3447116352. Its totient is φ = 509397504.

The previous prime is 1625754619. The next prime is 1625754649. The reversal of 1625754642 is 2464575261.

It is a junction number, because it is equal to n+sod(n) for n = 1625754594 and 1625754603.

It is not an unprimeable number, because it can be changed into a prime (1625754649) 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, 74718 + ... + 93990.

It is an arithmetic number, because the mean of its divisors is an integer number (107722386).

Almost surely, 2^1625754642 is an apocalyptic number.

1625754642 is an abundant number, since it is smaller than the sum of its proper divisors (1821361710).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1625754642 is a wasteful number, since it uses less digits than its factorization.

1625754642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20122.

The product of its digits is 403200, while the sum is 42.

The square root of 1625754642 is about 40320.6478370574. The cubic root of 1625754642 is about 1175.8493070712.

The spelling of 1625754642 in words is "one billion, six hundred twenty-five million, seven hundred fifty-four thousand, six hundred forty-two".