1625155690 has 16 divisors (see below), whose sum is σ = 3079242720. Its totient is φ = 615848400.

The previous prime is 1625155673. The next prime is 1625155723. The reversal of 1625155690 is 965515261.

It is a super-2 number, since 2×1625155690² = 5282262033478752200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4276536 + ... + 4276915.

It is an arithmetic number, because the mean of its divisors is an integer number (192452670).

Almost surely, 2^1625155690 is an apocalyptic number.

1625155690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1625155690 is a deficient number, since it is larger than the sum of its proper divisors (1454087030).

1625155690 is a wasteful number, since it uses less digits than its factorization.

1625155690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8553477.

The product of its (nonzero) digits is 81000, while the sum is 40.

The square root of 1625155690 is about 40313.2197920236. The cubic root of 1625155690 is about 1175.7048892560.

The spelling of 1625155690 in words is "one billion, six hundred twenty-five million, one hundred fifty-five thousand, six hundred ninety".